Na7Ni17O24 is Caswellsilverite-like structured and crystallizes in the triclinic P1 space group. There are seven inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(11), one O(14), one O(18), one O(2), one O(20), and one O(8) atom to form NaO6 octahedra that share corners with three equivalent Ni(15)O6 octahedra, corners with three equivalent Ni(2)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(14)O6 octahedra,  an edgeedge with one Ni(5)O6 octahedra,  an edgeedge with one Ni(6)O6 octahedra,  an edgeedge with one Ni(7)O6 octahedra, edges with two equivalent Na(6)O6 octahedra, edges with two equivalent Ni(10)O6 octahedra, and edges with two equivalent Ni(16)O6 octahedra. The corner-sharing octahedral tilt angles range from 2-11°. In the second Na site, Na(2) is bonded to one O(1), one O(13), one O(15), one O(17), one O(22), and one O(9) atom to form NaO6 octahedra that share corners with three equivalent Ni(15)O6 octahedra, corners with three equivalent Ni(3)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(13)O6 octahedra,  an edgeedge with one Ni(7)O6 octahedra,  an edgeedge with one Ni(8)O6 octahedra, edges with two equivalent Ni(12)O6 octahedra, edges with two equivalent Ni(17)O6 octahedra, and edges with two equivalent Ni(9)O6 octahedra. The corner-sharing octahedral tilt angles range from 1-9°. In the third Na site, Na(3) is bonded to one O(1), one O(10), one O(13), one O(21), one O(24), and one O(3) atom to form NaO6 octahedra that share corners with three equivalent Ni(11)O6 octahedra, corners with three equivalent Ni(12)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Na(5)O6 octahedra,  an edgeedge with one Na(7)O6 octahedra,  an edgeedge with one Ni(17)O6 octahedra,  an edgeedge with one Ni(4)O6 octahedra,  an edgeedge with one Ni(9)O6 octahedra, edges with two equivalent Ni(13)O6 octahedra, edges with two equivalent Ni(3)O6 octahedra, and edges with two equivalent Ni(8)O6 octahedra. The corner-sharing octahedral tilt angles range from 1-14°. In the fourth Na site, Na(4) is bonded to one O(11), one O(15), one O(20), one O(22), one O(4), and one O(6) atom to form NaO6 octahedra that share corners with three equivalent Ni(10)O6 octahedra, corners with three equivalent Ni(12)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Na(6)O6 octahedra,  an edgeedge with one Ni(16)O6 octahedra,  an edgeedge with one Ni(17)O6 octahedra,  an edgeedge with one Ni(9)O6 octahedra, edges with two equivalent Ni(1)O6 octahedra, edges with two equivalent Ni(15)O6 octahedra, and edges with two equivalent Ni(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 1-14°. In the fifth Na site, Na(5) is bonded to one O(16), one O(19), one O(21), one O(3), one O(5), and one O(7) atom to form NaO6 octahedra that share corners with three equivalent Ni(6)O6 octahedra, corners with three equivalent Ni(8)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Ni(13)O6 octahedra,  an edgeedge with one Ni(14)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra,  an edgeedge with one Ni(3)O6 octahedra,  an edgeedge with one Ni(5)O6 octahedra, edges with two equivalent Na(7)O6 octahedra, edges with two equivalent Ni(11)O6 octahedra, and edges with two equivalent Ni(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 1-13°. In the sixth Na site, Na(6) is bonded to one O(18), one O(2), one O(20), one O(23), one O(6), and one O(8) atom to form NaO6 octahedra that share corners with three equivalent Ni(6)O6 octahedra, corners with three equivalent Ni(7)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(14)O6 octahedra,  an edgeedge with one Ni(15)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra,  an edgeedge with one Ni(5)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, edges with two equivalent Ni(10)O6 octahedra, and edges with two equivalent Ni(16)O6 octahedra. The corner-sharing octahedral tilt angles range from 1-13°. In the seventh Na site, Na(7) is bonded to one O(10), one O(12), one O(16), one O(19), one O(21), and one O(7) atom to form NaO6 octahedra that share corners with three equivalent Ni(2)O6 octahedra, corners with three equivalent Ni(3)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Ni(13)O6 octahedra,  an edgeedge with one Ni(14)O6 octahedra,  an edgeedge with one Ni(5)O6 octahedra,  an edgeedge with one Ni(6)O6 octahedra,  an edgeedge with one Ni(8)O6 octahedra, edges with two equivalent Na(5)O6 octahedra, edges with two equivalent Ni(11)O6 octahedra, and edges with two equivalent Ni(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 2-11°. There are seventeen inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to one O(11), one O(15), one O(17), one O(4), one O(6), and one O(8) atom to form NiO6 octahedra that share corners with three equivalent Ni(16)O6 octahedra, corners with three equivalent Ni(17)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Na(6)O6 octahedra,  an edgeedge with one Ni(10)O6 octahedra,  an edgeedge with one Ni(12)O6 octahedra,  an edgeedge with one Ni(9)O6 octahedra, edges with two equivalent Na(4)O6 octahedra, edges with two equivalent Ni(15)O6 octahedra, and edges with two equivalent Ni(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 9-13°. In the second Ni site, Ni(2) is bonded to one O(12), one O(14), one O(18), one O(19), one O(2), and one O(7) atom to form NiO6 octahedra that share corners with three equivalent Na(1)O6 octahedra, corners with three equivalent Na(7)O6 octahedra,  an edgeedge with one Na(5)O6 octahedra,  an edgeedge with one Na(6)O6 octahedra,  an edgeedge with one Ni(10)O6 octahedra,  an edgeedge with one Ni(11)O6 octahedra,  an edgeedge with one Ni(16)O6 octahedra,  an edgeedge with one Ni(4)O6 octahedra, edges with two equivalent Ni(14)O6 octahedra, edges with two equivalent Ni(5)O6 octahedra, and edges with two equivalent Ni(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 2-11°. In the third Ni site, Ni(3) is bonded to one O(1), one O(10), one O(13), one O(16), one O(21), and one O(9) atom to form NiO6 octahedra that share corners with three equivalent Na(2)O6 octahedra, corners with three equivalent Na(7)O6 octahedra,  an edgeedge with one Na(5)O6 octahedra,  an edgeedge with one Ni(11)O6 octahedra,  an edgeedge with one Ni(12)O6 octahedra,  an edgeedge with one Ni(17)O6 octahedra,  an edgeedge with one Ni(4)O6 octahedra,  an edgeedge with one Ni(9)O6 octahedra, edges with two equivalent Na(3)O6 octahedra, edges with two equivalent Ni(13)O6 octahedra, and edges with two equivalent Ni(8)O6 octahedra. The corner-sharing octahedral tilt angles range from 1-9°. In the fourth Ni site, Ni(4) is bonded to one O(10), one O(12), one O(16), one O(3), one O(5), and one O(7) atom to form NiO6 octahedra that share corners with three equivalent Ni(13)O6 octahedra, corners with three equivalent Ni(14)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra,  an edgeedge with one Ni(3)O6 octahedra,  an edgeedge with one Ni(5)O6 octahedra,  an edgeedge with one Ni(6)O6 octahedra,  an edgeedge with one Ni(8)O6 octahedra, edges with two equivalent Na(5)O6 octahedra, edges with two equivalent Na(7)O6 octahedra, and edges with two equivalent Ni(11)O6 octahedra. The corner-sharing octahedral tilt angles range from 7-13°. In the fifth Ni site, Ni(5) is bonded to one O(12), one O(14), one O(19), one O(2), one O(23), and one O(5) atom to form NiO6 octahedra that share corners with three equivalent Ni(10)O6 octahedra, corners with three equivalent Ni(11)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(5)O6 octahedra,  an edgeedge with one Na(6)O6 octahedra,  an edgeedge with one Na(7)O6 octahedra,  an edgeedge with one Ni(16)O6 octahedra,  an edgeedge with one Ni(4)O6 octahedra, edges with two equivalent Ni(14)O6 octahedra, edges with two equivalent Ni(2)O6 octahedra, and edges with two equivalent Ni(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 6-13°. In the sixth Ni site, Ni(6) is bonded to one O(18), one O(19), one O(2), one O(23), one O(5), and one O(7) atom to form NiO6 octahedra that share corners with three equivalent Na(5)O6 octahedra, corners with three equivalent Na(6)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(7)O6 octahedra,  an edgeedge with one Ni(10)O6 octahedra,  an edgeedge with one Ni(11)O6 octahedra,  an edgeedge with one Ni(16)O6 octahedra,  an edgeedge with one Ni(4)O6 octahedra, edges with two equivalent Ni(14)O6 octahedra, edges with two equivalent Ni(2)O6 octahedra, and edges with two equivalent Ni(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 1-11°. In the seventh Ni site, Ni(7) is bonded to one O(17), one O(20), one O(22), one O(4), one O(6), and one O(8) atom to form NiO6 octahedra that share corners with three equivalent Na(6)O6 octahedra, corners with three equivalent Ni(9)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Ni(10)O6 octahedra,  an edgeedge with one Ni(12)O6 octahedra,  an edgeedge with one Ni(16)O6 octahedra,  an edgeedge with one Ni(17)O6 octahedra, edges with two equivalent Na(4)O6 octahedra, edges with two equivalent Ni(1)O6 octahedra, and edges with two equivalent Ni(15)O6 octahedra. The corner-sharing octahedral tilt angles range from 7-13°. In the eighth Ni site, Ni(8) is bonded to one O(1), one O(16), one O(21), one O(24), one O(3), and one O(9) atom to form NiO6 octahedra that share corners with three equivalent Na(5)O6 octahedra, corners with three equivalent Ni(9)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Na(7)O6 octahedra,  an edgeedge with one Ni(11)O6 octahedra,  an edgeedge with one Ni(12)O6 octahedra,  an edgeedge with one Ni(17)O6 octahedra,  an edgeedge with one Ni(4)O6 octahedra, edges with two equivalent Na(3)O6 octahedra, edges with two equivalent Ni(13)O6 octahedra, and edges with two equivalent Ni(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 6-13°. In the ninth Ni site, Ni(9) is bonded to one O(1), one O(17), one O(22), one O(24), one O(4), and one O(9) atom to form NiO6 octahedra that share corners with three equivalent Ni(7)O6 octahedra, corners with three equivalent Ni(8)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(13)O6 octahedra,  an edgeedge with one Ni(15)O6 octahedra,  an edgeedge with one Ni(3)O6 octahedra, edges with two equivalent Na(2)O6 octahedra, edges with two equivalent Ni(12)O6 octahedra, and edges with two equivalent Ni(17)O6 octahedra. The corner-sharing octahedral tilt angles range from 9-12°. In the tenth Ni site, Ni(10) is bonded to one O(11), one O(14), one O(2), one O(20), one O(23), and one O(6) atom to form NiO6 octahedra that share corners with three equivalent Na(4)O6 octahedra, corners with three equivalent Ni(5)O6 octahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(14)O6 octahedra,  an edgeedge with one Ni(15)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra,  an edgeedge with one Ni(6)O6 octahedra,  an edgeedge with one Ni(7)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, edges with two equivalent Na(6)O6 octahedra, and edges with two equivalent Ni(16)O6 octahedra. The corner-sharing octahedral tilt angles range from 5-14°. In the eleventh Ni site, Ni(11) is bonded to one O(10), one O(12), one O(19), one O(21), one O(3), and one O(5) atom to form NiO6 octahedra that share corners with three equivalent Na(3)O6 octahedra, corners with three equivalent Ni(5)O6 octahedra,  an edgeedge with one Ni(13)O6 octahedra,  an edgeedge with one Ni(14)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra,  an edgeedge with one Ni(3)O6 octahedra,  an edgeedge with one Ni(6)O6 octahedra,  an edgeedge with one Ni(8)O6 octahedra, edges with two equivalent Na(5)O6 octahedra, edges with two equivalent Na(7)O6 octahedra, and edges with two equivalent Ni(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 5-14°. In the twelfth Ni site, Ni(12) is bonded to one O(1), one O(13), one O(15), one O(22), one O(24), and one O(4) atom to form NiO6 octahedra that share corners with three equivalent Na(3)O6 octahedra, corners with three equivalent Na(4)O6 octahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(13)O6 octahedra,  an edgeedge with one Ni(15)O6 octahedra,  an edgeedge with one Ni(3)O6 octahedra,  an edgeedge with one Ni(7)O6 octahedra,  an edgeedge with one Ni(8)O6 octahedra, edges with two equivalent Na(2)O6 octahedra, edges with two equivalent Ni(17)O6 octahedra, and edges with two equivalent Ni(9)O6 octahedra. The corner-sharing octahedral tilt angles range from 1-10°. In the thirteenth Ni site, Ni(13) is bonded to one O(10), one O(13), one O(16), one O(24), one O(3), and one O(9) atom to form NiO6 octahedra that share corners with three equivalent Ni(17)O6 octahedra, corners with three equivalent Ni(4)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Na(5)O6 octahedra,  an edgeedge with one Na(7)O6 octahedra,  an edgeedge with one Ni(11)O6 octahedra,  an edgeedge with one Ni(12)O6 octahedra,  an edgeedge with one Ni(9)O6 octahedra, edges with two equivalent Na(3)O6 octahedra, edges with two equivalent Ni(3)O6 octahedra, and edges with two equivalent Ni(8)O6 octahedra. The corner-sharing octahedral tilt angles range from 8-12°. In the fourteenth Ni site, Ni(14) is bonded to one O(12), one O(14), one O(18), one O(23), one O(5), and one O(7) atom to form NiO6 octahedra that share corners with three equivalent Ni(16)O6 octahedra, corners with three equivalent Ni(4)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(5)O6 octahedra,  an edgeedge with one Na(6)O6 octahedra,  an edgeedge with one Na(7)O6 octahedra,  an edgeedge with one Ni(10)O6 octahedra,  an edgeedge with one Ni(11)O6 octahedra, edges with two equivalent Ni(2)O6 octahedra, edges with two equivalent Ni(5)O6 octahedra, and edges with two equivalent Ni(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 6-13°. In the fifteenth Ni site, Ni(15) is bonded to one O(11), one O(15), one O(17), one O(20), one O(22), and one O(8) atom to form NiO6 octahedra that share corners with three equivalent Na(1)O6 octahedra, corners with three equivalent Na(2)O6 octahedra,  an edgeedge with one Na(6)O6 octahedra,  an edgeedge with one Ni(10)O6 octahedra,  an edgeedge with one Ni(12)O6 octahedra,  an edgeedge with one Ni(16)O6 octahedra,  an edgeedge with one Ni(17)O6 octahedra,  an edgeedge with one Ni(9)O6 octahedra, edges with two equivalent Na(4)O6 octahedra, edges with two equivalent Ni(1)O6 octahedra, and edges with two equivalent Ni(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 1-9°. In the sixteenth Ni site, Ni(16) is bonded to one O(11), one O(14), one O(18), one O(23), one O(6), and one O(8) atom to form NiO6 octahedra that share corners with three equivalent Ni(1)O6 octahedra, corners with three equivalent Ni(14)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Ni(15)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra,  an edgeedge with one Ni(5)O6 octahedra,  an edgeedge with one Ni(6)O6 octahedra,  an edgeedge with one Ni(7)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, edges with two equivalent Na(6)O6 octahedra, and edges with two equivalent Ni(10)O6 octahedra. The corner-sharing octahedral tilt angles range from 6-13°. In the seventeenth Ni site, Ni(17) is bonded to one O(13), one O(15), one O(17), one O(24), one O(4), and one O(9) atom to form NiO6 octahedra that share corners with three equivalent Ni(1)O6 octahedra, corners with three equivalent Ni(13)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Ni(15)O6 octahedra,  an edgeedge with one Ni(3)O6 octahedra,  an edgeedge with one Ni(7)O6 octahedra,  an edgeedge with one Ni(8)O6 octahedra, edges with two equivalent Na(2)O6 octahedra, edges with two equivalent Ni(12)O6 octahedra, and edges with two equivalent Ni(9)O6 octahedra. The corner-sharing octahedral tilt angles range from 8-13°. There are twenty-four inequivalent O sites. In the first O site, O(1) is bonded to one Na(2), one Na(3), one Ni(12), one Ni(3), one Ni(8), and one Ni(9) atom to form ONa2Ni4 octahedra that share corners with three equivalent O(22)Na2Ni4 octahedra, corners with three equivalent O(21)Na3Ni3 octahedra,  an edgeedge with one O(10)Na2Ni4 octahedra,  an edgeedge with one O(15)Na2Ni4 octahedra,  an edgeedge with one O(16)Na2Ni4 octahedra,  an edgeedge with one O(3)Na2Ni4 octahedra,  an edgeedge with one O(17)NaNi5 octahedra,  an edgeedge with one O(4)NaNi5 octahedra, edges with two equivalent O(13)Na2Ni4 octahedra, edges with two equivalent O(24)NaNi5 octahedra, and edges with two equivalent O(9)NaNi5 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the second O site, O(2) is bonded to one Na(1), one Na(6), one Ni(10), one Ni(2), one Ni(5), and one Ni(6) atom to form ONa2Ni4 octahedra that share corners with three equivalent O(19)Na2Ni4 octahedra, corners with three equivalent O(20)Na3Ni3 octahedra,  an edgeedge with one O(11)Na2Ni4 octahedra,  an edgeedge with one O(6)Na2Ni4 octahedra,  an edgeedge with one O(7)Na2Ni4 octahedra,  an edgeedge with one O(8)Na2Ni4 octahedra,  an edgeedge with one O(12)NaNi5 octahedra,  an edgeedge with one O(5)NaNi5 octahedra, edges with two equivalent O(18)Na2Ni4 octahedra, edges with two equivalent O(14)NaNi5 octahedra, and edges with two equivalent O(23)NaNi5 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. In the third O site, O(3) is bonded to one Na(3), one Na(5), one Ni(11), one Ni(13), one Ni(4), and one Ni(8) atom to form ONa2Ni4 octahedra that share corners with three equivalent O(24)NaNi5 octahedra, corners with three equivalent O(5)NaNi5 octahedra,  an edgeedge with one O(1)Na2Ni4 octahedra,  an edgeedge with one O(13)Na2Ni4 octahedra,  an edgeedge with one O(19)Na2Ni4 octahedra,  an edgeedge with one O(7)Na2Ni4 octahedra,  an edgeedge with one O(12)NaNi5 octahedra,  an edgeedge with one O(9)NaNi5 octahedra, edges with two equivalent O(10)Na2Ni4 octahedra, edges with two equivalent O(16)Na2Ni4 octahedra, and edges with two equivalent O(21)Na3Ni3 octahedra. The corner-sharing octahedral tilt angles range from 1-5°. In the fourth O site, O(4) is bonded to one Na(4), one Ni(1), one Ni(12), one Ni(17), one Ni(7), and one Ni(9) atom to form ONaNi5 octahedra that share corners with three equivalent O(6)Na2Ni4 octahedra, corners with three equivalent O(24)NaNi5 octahedra,  an edgeedge with one O(1)Na2Ni4 octahedra,  an edgeedge with one O(11)Na2Ni4 octahedra,  an edgeedge with one O(13)Na2Ni4 octahedra,  an edgeedge with one O(8)Na2Ni4 octahedra,  an edgeedge with one O(20)Na3Ni3 octahedra,  an edgeedge with one O(9)NaNi5 octahedra, edges with two equivalent O(15)Na2Ni4 octahedra, edges with two equivalent O(22)Na2Ni4 octahedra, and edges with two equivalent O(17)NaNi5 octahedra. The corner-sharing octahedral tilt angles range from 0-5°. In the fifth O site, O(5) is bonded to one Na(5), one Ni(11), one Ni(14), one Ni(4), one Ni(5), and one Ni(6) atom to form ONaNi5 octahedra that share corners with three equivalent O(3)Na2Ni4 octahedra, corners with three equivalent O(23)NaNi5 octahedra,  an edgeedge with one O(10)Na2Ni4 octahedra,  an edgeedge with one O(16)Na2Ni4 octahedra,  an edgeedge with one O(18)Na2Ni4 octahedra,  an edgeedge with one O(2)Na2Ni4 octahedra,  an edgeedge with one O(21)Na3Ni3 octahedra,  an edgeedge with one O(14)NaNi5 octahedra, edges with two equivalent O(19)Na2Ni4 octahedra, edges with two equivalent O(7)Na2Ni4 octahedra, and edges with two equivalent O(12)NaNi5 octahedra. The corner-sharing octahedral tilt angles range from 0-5°. In the sixth O site, O(6) is bonded to one Na(4), one Na(6), one Ni(1), one Ni(10), one Ni(16), and one Ni(7) atom to form ONa2Ni4 octahedra that share corners with three equivalent O(23)NaNi5 octahedra, corners with three equivalent O(4)NaNi5 octahedra,  an edgeedge with one O(15)Na2Ni4 octahedra,  an edgeedge with one O(18)Na2Ni4 octahedra,  an edgeedge with one O(2)Na2Ni4 octahedra,  an edgeedge with one O(22)Na2Ni4 octahedra,  an edgeedge with one O(14)NaNi5 octahedra,  an edgeedge with one O(17)NaNi5 octahedra, edges with two equivalent O(11)Na2Ni4 octahedra, edges with two equivalent O(8)Na2Ni4 octahedra, and edges with two equivalent O(20)Na3Ni3 octahedra. The corner-sharing octahedral tilt angles range from 1-5°. In the seventh O site, O(7) is bonded to one Na(5), one Na(7), one Ni(14), one Ni(2), one Ni(4), and one Ni(6) atom to form ONa2Ni4 octahedra that share corners with three equivalent O(16)Na2Ni4 octahedra, corners with three equivalent O(18)Na2Ni4 octahedra,  an edgeedge with one O(10)Na2Ni4 octahedra,  an edgeedge with one O(2)Na2Ni4 octahedra,  an edgeedge with one O(3)Na2Ni4 octahedra,  an edgeedge with one O(21)Na3Ni3 octahedra,  an edgeedge with one O(14)NaNi5 octahedra,  an edgeedge with one O(23)NaNi5 octahedra, edges with two equivalent O(19)Na2Ni4 octahedra, edges with two equivalent O(12)NaNi5 octahedra, and edges with two equivalent O(5)NaNi5 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the eighth O site, O(8) is bonded to one Na(1), one Na(6), one Ni(1), one Ni(15), one Ni(16), and one Ni(7) atom to form ONa2Ni4 octahedra that share corners with three equivalent O(18)Na2Ni4 octahedra, corners with three equivalent O(17)NaNi5 octahedra,  an edgeedge with one O(15)Na2Ni4 octahedra,  an edgeedge with one O(2)Na2Ni4 octahedra,  an edgeedge with one O(22)Na2Ni4 octahedra,  an edgeedge with one O(14)NaNi5 octahedra,  an edgeedge with one O(23)NaNi5 octahedra,  an edgeedge with one O(4)NaNi5 octahedra, edges with two equivalent O(11)Na2Ni4 octahedra, edges with two equivalent O(6)Na2Ni4 octahedra, and edges with two equivalent O(20)Na3Ni3 octahedra. The corner-sharing octahedral tilt angles range from 1-6°. In the ninth O site, O(9) is bonded to one Na(2), one Ni(13), one Ni(17), one Ni(3), one Ni(8), and one Ni(9) atom to form ONaNi5 octahedra that share corners with three equivalent O(16)Na2Ni4 octahedra, corners with three equivalent O(17)NaNi5 octahedra,  an edgeedge with one O(10)Na2Ni4 octahedra,  an edgeedge with one O(15)Na2Ni4 octahedra,  an edgeedge with one O(22)Na2Ni4 octahedra,  an edgeedge with one O(3)Na2Ni4 octahedra,  an edgeedge with one O(21)Na3Ni3 octahedra,  an edgeedge with one O(4)NaNi5 octahedra, edges with two equivalent O(1)Na2Ni4 octahedra, edges with two equivalent O(13)Na2Ni4 octahedra, and edges with two equivalent O(24)NaNi5 octahedra. The corner-sharing octahedral tilt angles range from 0-6°. In the tenth O site, O(10) is bonded to one Na(3), one Na(7), one Ni(11), one Ni(13), one Ni(3), and one Ni(4) atom to form ONa2Ni4 octahedra that share corners with three equivalent O(13)Na2Ni4 octahedra, corners with three equivalent O(12)NaNi5 octahedra,  an edgeedge with one O(1)Na2Ni4 octahedra,  an edgeedge with one O(19)Na2Ni4 octahedra,  an edgeedge with one O(7)Na2Ni4 octahedra,  an edgeedge with one O(24)NaNi5 octahedra,  an edgeedge with one O(5)NaNi5 octahedra,  an edgeedge with one O(9)NaNi5 octahedra, edges with two equivalent O(16)Na2Ni4 octahedra, edges with two equivalent O(3)Na2Ni4 octahedra, and edges with two equivalent O(21)Na3Ni3 octahedra. The corner-sharing octahedral tilt angles range from 1-6°. In the eleventh O site, O(11) is bonded to one Na(1), one Na(4), one Ni(1), one Ni(10), one Ni(15), and one Ni(16) atom to form ONa2Ni4 octahedra that share corners with three equivalent O(15)Na2Ni4 octahedra, corners with three equivalent O(14)NaNi5 octahedra,  an edgeedge with one O(18)Na2Ni4 octahedra,  an edgeedge with one O(2)Na2Ni4 octahedra,  an edgeedge with one O(22)Na2Ni4 octahedra,  an edgeedge with one O(17)NaNi5 octahedra,  an edgeedge with one O(23)NaNi5 octahedra,  an edgeedge with one O(4)NaNi5 octahedra, edges with two equivalent O(6)Na2Ni4 octahedra, edges with two equivalent O(8)Na2Ni4 octahedra, and edges with two equivalent O(20)Na3Ni3 octahedra. The corner-sharing octahedral tilt angles range from 1-6°. In the twelfth O site, O(12) is bonded to one Na(7), one Ni(11), one Ni(14), one Ni(2), one Ni(4), and one Ni(5) atom to form ONaNi5 octahedra that share corners with three equivalent O(10)Na2Ni4 octahedra, corners with three equivalent O(14)NaNi5 octahedra,  an edgeedge with one O(16)Na2Ni4 octahedra,  an edgeedge with one O(18)Na2Ni4 octahedra,  an edgeedge with one O(2)Na2Ni4 octahedra,  an edgeedge with one O(3)Na2Ni4 octahedra,  an edgeedge with one O(21)Na3Ni3 octahedra,  an edgeedge with one O(23)NaNi5 octahedra, edges with two equivalent O(19)Na2Ni4 octahedra, edges with two equivalent O(7)Na2Ni4 octahedra, and edges with two equivalent O(5)NaNi5 octahedra. The corner-sharing octahedral tilt angles range from 0-6°. In the thirteenth O site, O(13) is bonded to one Na(2), one Na(3), one Ni(12), one Ni(13), one Ni(17), and one Ni(3) atom to form ONa2Ni4 octahedra that share corners with three equivalent O(10)Na2Ni4 octahedra, corners with three equivalent O(15)Na2Ni4 octahedra,  an edgeedge with one O(16)Na2Ni4 octahedra,  an edgeedge with one O(22)Na2Ni4 octahedra,  an edgeedge with one O(3)Na2Ni4 octahedra,  an edgeedge with one O(21)Na3Ni3 octahedra,  an edgeedge with one O(17)NaNi5 octahedra,  an edgeedge with one O(4)NaNi5 octahedra, edges with two equivalent O(1)Na2Ni4 octahedra, edges with two equivalent O(24)NaNi5 octahedra, and edges with two equivalent O(9)NaNi5 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. In the fourteenth O site, O(14) is bonded to one Na(1), one Ni(10), one Ni(14), one Ni(16), one Ni(2), and one Ni(5) atom to form ONaNi5 octahedra that share corners with three equivalent O(11)Na2Ni4 octahedra, corners with three equivalent O(12)NaNi5 octahedra,  an edgeedge with one O(19)Na2Ni4 octahedra,  an edgeedge with one O(6)Na2Ni4 octahedra,  an edgeedge with one O(7)Na2Ni4 octahedra,  an edgeedge with one O(8)Na2Ni4 octahedra,  an edgeedge with one O(20)Na3Ni3 octahedra,  an edgeedge with one O(5)NaNi5 octahedra, edges with two equivalent O(18)Na2Ni4 octahedra, edges with two equivalent O(2)Na2Ni4 octahedra, and edges with two equivalent O(23)NaNi5 octahedra. The corner-sharing octahedral tilt angles range from 0-6°. In the fifteenth O site, O(15) is bonded to one Na(2), one Na(4), one Ni(1), one Ni(12), one Ni(15), and one Ni(17) atom to form ONa2Ni4 octahedra that share corners with three equivalent O(11)Na2Ni4 octahedra, corners with three equivalent O(13)Na2Ni4 octahedra,  an edgeedge with one O(1)Na2Ni4 octahedra,  an edgeedge with one O(6)Na2Ni4 octahedra,  an edgeedge with one O(8)Na2Ni4 octahedra,  an edgeedge with one O(20)Na3Ni3 octahedra,  an edgeedge with one O(24)NaNi5 octahedra,  an edgeedge with one O(9)NaNi5 octahedra, edges with two equivalent O(22)Na2Ni4 octahedra, edges with two equivalent O(17)NaNi5 octahedra, and edges with two equivalent O(4)NaNi5 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. In the sixteenth O site, O(16) is bonded to one Na(5), one Na(7), one Ni(13), one Ni(3), one Ni(4), and one Ni(8) atom to form ONa2Ni4 octahedra that share corners with three equivalent O(7)Na2Ni4 octahedra, corners with three equivalent O(9)NaNi5 octahedra,  an edgeedge with one O(1)Na2Ni4 octahedra,  an edgeedge with one O(13)Na2Ni4 octahedra,  an edgeedge with one O(19)Na2Ni4 octahedra,  an edgeedge with one O(12)NaNi5 octahedra,  an edgeedge with one O(24)NaNi5 octahedra,  an edgeedge with one O(5)NaNi5 octahedra, edges with two equivalent O(10)Na2Ni4 octahedra, edges with two equivalent O(3)Na2Ni4 octahedra, and edges with two equivalent O(21)Na3Ni3 octahedra. The corner-sharing octahedral tilt angles range from 1-6°. In the seventeenth O site, O(17) is bonded to one Na(2), one Ni(1), one Ni(15), one Ni(17), one Ni(7), and one Ni(9) atom to form ONaNi5 octahedra that share corners with three equivalent O(8)Na2Ni4 octahedra, corners with three equivalent O(9)NaNi5 octahedra,  an edgeedge with one O(1)Na2Ni4 octahedra,  an edgeedge with one O(11)Na2Ni4 octahedra,  an edgeedge with one O(13)Na2Ni4 octahedra,  an edgeedge with one O(6)Na2Ni4 octahedra,  an edgeedge with one O(20)Na3Ni3 octahedra,  an edgeedge with one O(24)NaNi5 octahedra, edges with two equivalent O(15)Na2Ni4 octahedra, edges with two equivalent O(22)Na2Ni4 octahedra, and edges with two equivalent O(4)NaNi5 octahedra. The corner-sharing octahedral tilt angles range from 0-6°. In the eighteenth O site, O(18) is bonded to one Na(1), one Na(6), one Ni(14), one Ni(16), one Ni(2), and one Ni(6) atom to form ONa2Ni4 octahedra that share corners with three equivalent O(7)Na2Ni4 octahedra, corners with three equivalent O(8)Na2Ni4 octahedra,  an edgeedge with one O(11)Na2Ni4 octahedra,  an edgeedge with one O(19)Na2Ni4 octahedra,  an edgeedge with one O(6)Na2Ni4 octahedra,  an edgeedge with one O(20)Na3Ni3 octahedra,  an edgeedge with one O(12)NaNi5 octahedra,  an edgeedge with one O(5)NaNi5 octahedra, edges with two equivalent O(2)Na2Ni4 octahedra, edges with two equivalent O(14)NaNi5 octahedra, and edges with two equivalent O(23)NaNi5 octahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the nineteenth O site, O(19) is bonded to one Na(5), one Na(7), one Ni(11), one Ni(2), one Ni(5), and one Ni(6) atom to form ONa2Ni4 octahedra that share corners with three equivalent O(2)Na2Ni4 octahedra, corners with three equivalent O(21)Na3Ni3 octahedra,  an edgeedge with one O(10)Na2Ni4 octahedra,  an edgeedge with one O(16)Na2Ni4 octahedra,  an edgeedge with one O(18)Na2Ni4 octahedra,  an edgeedge with one O(3)Na2Ni4 octahedra,  an edgeedge with one O(14)NaNi5 octahedra,  an edgeedge with one O(23)NaNi5 octahedra, edges with two equivalent O(7)Na2Ni4 octahedra, edges with two equivalent O(12)NaNi5 octahedra, and edges with two equivalent O(5)NaNi5 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. In the twentieth O site, O(20) is bonded to one Na(1), one Na(4), one Na(6), one Ni(10), one Ni(15), and one Ni(7) atom to form ONa3Ni3 octahedra that share corners with three equivalent O(2)Na2Ni4 octahedra, corners with three equivalent O(22)Na2Ni4 octahedra,  an edgeedge with one O(15)Na2Ni4 octahedra,  an edgeedge with one O(18)Na2Ni4 octahedra,  an edgeedge with one O(14)NaNi5 octahedra,  an edgeedge with one O(17)NaNi5 octahedra,  an edgeedge with one O(23)NaNi5 octahedra,  an edgeedge with one O(4)NaNi5 octahedra, edges with two equivalent O(11)Na2Ni4 octahedra, edges with two equivalent O(6)Na2Ni4 octahedra, and edges with two equivalent O(8)Na2Ni4 octahedra. The corner-sharing octahedral tilt angles range from 1-4°. In the twenty-first O site, O(21) is bonded to one Na(3), one Na(5), one Na(7), one Ni(11), one Ni(3), and one Ni(8) atom to form ONa3Ni3 octahedra that share corners with three equivalent O(1)Na2Ni4 octahedra, corners with three equivalent O(19)Na2Ni4 octahedra,  an edgeedge with one O(13)Na2Ni4 octahedra,  an edgeedge with one O(7)Na2Ni4 octahedra,  an edgeedge with one O(12)NaNi5 octahedra,  an edgeedge with one O(24)NaNi5 octahedra,  an edgeedge with one O(5)NaNi5 octahedra,  an edgeedge with one O(9)NaNi5 octahedra, edges with two equivalent O(10)Na2Ni4 octahedra, edges with two equivalent O(16)Na2Ni4 octahedra, and edges with two equivalent O(3)Na2Ni4 octahedra. The corner-sharing octahedral tilt angles range from 1-4°. In the twenty-second O site, O(22) is bonded to one Na(2), one Na(4), one Ni(12), one Ni(15), one Ni(7), and one Ni(9) atom to form ONa2Ni4 octahedra that share corners with three equivalent O(1)Na2Ni4 octahedra, corners with three equivalent O(20)Na3Ni3 octahedra,  an edgeedge with one O(11)Na2Ni4 octahedra,  an edgeedge with one O(13)Na2Ni4 octahedra,  an edgeedge with one O(6)Na2Ni4 octahedra,  an edgeedge with one O(8)Na2Ni4 octahedra,  an edgeedge with one O(24)NaNi5 octahedra,  an edgeedge with one O(9)NaNi5 octahedra, edges with two equivalent O(15)Na2Ni4 octahedra, edges with two equivalent O(17)NaNi5 octahedra, and edges with two equivalent O(4)NaNi5 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the twenty-third O site, O(23) is bonded to one Na(6), one Ni(10), one Ni(14), one Ni(16), one Ni(5), and one Ni(6) atom to form ONaNi5 octahedra that share corners with three equivalent O(6)Na2Ni4 octahedra, corners with three equivalent O(5)NaNi5 octahedra,  an edgeedge with one O(11)Na2Ni4 octahedra,  an edgeedge with one O(19)Na2Ni4 octahedra,  an edgeedge with one O(7)Na2Ni4 octahedra,  an edgeedge with one O(8)Na2Ni4 octahedra,  an edgeedge with one O(20)Na3Ni3 octahedra,  an edgeedge with one O(12)NaNi5 octahedra, edges with two equivalent O(18)Na2Ni4 octahedra, edges with two equivalent O(2)Na2Ni4 octahedra, and edges with two equivalent O(14)NaNi5 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. In the twenty-fourth O site, O(24) is bonded to one Na(3), one Ni(12), one Ni(13), one Ni(17), one Ni(8), and one Ni(9) atom to form ONaNi5 octahedra that share corners with three equivalent O(3)Na2Ni4 octahedra, corners with three equivalent O(4)NaNi5 octahedra,  an edgeedge with one O(10)Na2Ni4 octahedra,  an edgeedge with one O(15)Na2Ni4 octahedra,  an edgeedge with one O(16)Na2Ni4 octahedra,  an edgeedge with one O(22)Na2Ni4 octahedra,  an edgeedge with one O(21)Na3Ni3 octahedra,  an edgeedge with one O(17)NaNi5 octahedra, edges with two equivalent O(1)Na2Ni4 octahedra, edges with two equivalent O(13)Na2Ni4 octahedra, and edges with two equivalent O(9)NaNi5 octahedra. The corner-sharing octahedral tilt angles range from 0-5°.
Na7Ni17O24 is Caswellsilverite-like structured and crystallizes in the triclinic P1 space group. There are seven inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(11), one O(14), one O(18), one O(2), one O(20), and one O(8) atom to form NaO6 octahedra that share corners with three equivalent Ni(15)O6 octahedra, corners with three equivalent Ni(2)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(14)O6 octahedra,  an edgeedge with one Ni(5)O6 octahedra,  an edgeedge with one Ni(6)O6 octahedra,  an edgeedge with one Ni(7)O6 octahedra, edges with two equivalent Na(6)O6 octahedra, edges with two equivalent Ni(10)O6 octahedra, and edges with two equivalent Ni(16)O6 octahedra. The corner-sharing octahedral tilt angles range from 2-11°. The Na(1)-O(11) bond length is 2.29 Å. The Na(1)-O(14) bond length is 2.26 Å. The Na(1)-O(18) bond length is 2.33 Å. The Na(1)-O(2) bond length is 2.31 Å. The Na(1)-O(20) bond length is 2.35 Å. The Na(1)-O(8) bond length is 2.33 Å. In the second Na site, Na(2) is bonded to one O(1), one O(13), one O(15), one O(17), one O(22), and one O(9) atom to form NaO6 octahedra that share corners with three equivalent Ni(15)O6 octahedra, corners with three equivalent Ni(3)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(13)O6 octahedra,  an edgeedge with one Ni(7)O6 octahedra,  an edgeedge with one Ni(8)O6 octahedra, edges with two equivalent Ni(12)O6 octahedra, edges with two equivalent Ni(17)O6 octahedra, and edges with two equivalent Ni(9)O6 octahedra. The corner-sharing octahedral tilt angles range from 1-9°. The Na(2)-O(1) bond length is 2.32 Å. The Na(2)-O(13) bond length is 2.27 Å. The Na(2)-O(15) bond length is 2.29 Å. The Na(2)-O(17) bond length is 2.29 Å. The Na(2)-O(22) bond length is 2.32 Å. The Na(2)-O(9) bond length is 2.28 Å. In the third Na site, Na(3) is bonded to one O(1), one O(10), one O(13), one O(21), one O(24), and one O(3) atom to form NaO6 octahedra that share corners with three equivalent Ni(11)O6 octahedra, corners with three equivalent Ni(12)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Na(5)O6 octahedra,  an edgeedge with one Na(7)O6 octahedra,  an edgeedge with one Ni(17)O6 octahedra,  an edgeedge with one Ni(4)O6 octahedra,  an edgeedge with one Ni(9)O6 octahedra, edges with two equivalent Ni(13)O6 octahedra, edges with two equivalent Ni(3)O6 octahedra, and edges with two equivalent Ni(8)O6 octahedra. The corner-sharing octahedral tilt angles range from 1-14°. The Na(3)-O(1) bond length is 2.28 Å. The Na(3)-O(10) bond length is 2.27 Å. The Na(3)-O(13) bond length is 2.30 Å. The Na(3)-O(21) bond length is 2.26 Å. The Na(3)-O(24) bond length is 2.31 Å. The Na(3)-O(3) bond length is 2.26 Å. In the fourth Na site, Na(4) is bonded to one O(11), one O(15), one O(20), one O(22), one O(4), and one O(6) atom to form NaO6 octahedra that share corners with three equivalent Ni(10)O6 octahedra, corners with three equivalent Ni(12)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Na(6)O6 octahedra,  an edgeedge with one Ni(16)O6 octahedra,  an edgeedge with one Ni(17)O6 octahedra,  an edgeedge with one Ni(9)O6 octahedra, edges with two equivalent Ni(1)O6 octahedra, edges with two equivalent Ni(15)O6 octahedra, and edges with two equivalent Ni(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 1-14°. The Na(4)-O(11) bond length is 2.27 Å. The Na(4)-O(15) bond length is 2.31 Å. The Na(4)-O(20) bond length is 2.26 Å. The Na(4)-O(22) bond length is 2.28 Å. The Na(4)-O(4) bond length is 2.31 Å. The Na(4)-O(6) bond length is 2.26 Å. In the fifth Na site, Na(5) is bonded to one O(16), one O(19), one O(21), one O(3), one O(5), and one O(7) atom to form NaO6 octahedra that share corners with three equivalent Ni(6)O6 octahedra, corners with three equivalent Ni(8)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Ni(13)O6 octahedra,  an edgeedge with one Ni(14)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra,  an edgeedge with one Ni(3)O6 octahedra,  an edgeedge with one Ni(5)O6 octahedra, edges with two equivalent Na(7)O6 octahedra, edges with two equivalent Ni(11)O6 octahedra, and edges with two equivalent Ni(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 1-13°. The Na(5)-O(16) bond length is 2.25 Å. The Na(5)-O(19) bond length is 2.32 Å. The Na(5)-O(21) bond length is 2.26 Å. The Na(5)-O(3) bond length is 2.26 Å. The Na(5)-O(5) bond length is 2.33 Å. The Na(5)-O(7) bond length is 2.25 Å. In the sixth Na site, Na(6) is bonded to one O(18), one O(2), one O(20), one O(23), one O(6), and one O(8) atom to form NaO6 octahedra that share corners with three equivalent Ni(6)O6 octahedra, corners with three equivalent Ni(7)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(14)O6 octahedra,  an edgeedge with one Ni(15)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra,  an edgeedge with one Ni(5)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, edges with two equivalent Ni(10)O6 octahedra, and edges with two equivalent Ni(16)O6 octahedra. The corner-sharing octahedral tilt angles range from 1-13°. The Na(6)-O(18) bond length is 2.24 Å. The Na(6)-O(2) bond length is 2.32 Å. The Na(6)-O(20) bond length is 2.26 Å. The Na(6)-O(23) bond length is 2.32 Å. The Na(6)-O(6) bond length is 2.26 Å. The Na(6)-O(8) bond length is 2.25 Å. In the seventh Na site, Na(7) is bonded to one O(10), one O(12), one O(16), one O(19), one O(21), and one O(7) atom to form NaO6 octahedra that share corners with three equivalent Ni(2)O6 octahedra, corners with three equivalent Ni(3)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Ni(13)O6 octahedra,  an edgeedge with one Ni(14)O6 octahedra,  an edgeedge with one Ni(5)O6 octahedra,  an edgeedge with one Ni(6)O6 octahedra,  an edgeedge with one Ni(8)O6 octahedra, edges with two equivalent Na(5)O6 octahedra, edges with two equivalent Ni(11)O6 octahedra, and edges with two equivalent Ni(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 2-11°. The Na(7)-O(10) bond length is 2.26 Å. The Na(7)-O(12) bond length is 2.27 Å. The Na(7)-O(16) bond length is 2.32 Å. The Na(7)-O(19) bond length is 2.32 Å. The Na(7)-O(21) bond length is 2.36 Å. The Na(7)-O(7) bond length is 2.34 Å. There are seventeen inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to one O(11), one O(15), one O(17), one O(4), one O(6), and one O(8) atom to form NiO6 octahedra that share corners with three equivalent Ni(16)O6 octahedra, corners with three equivalent Ni(17)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Na(6)O6 octahedra,  an edgeedge with one Ni(10)O6 octahedra,  an edgeedge with one Ni(12)O6 octahedra,  an edgeedge with one Ni(9)O6 octahedra, edges with two equivalent Na(4)O6 octahedra, edges with two equivalent Ni(15)O6 octahedra, and edges with two equivalent Ni(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 9-13°. The Ni(1)-O(11) bond length is 2.13 Å. The Ni(1)-O(15) bond length is 2.15 Å. The Ni(1)-O(17) bond length is 2.18 Å. The Ni(1)-O(4) bond length is 2.21 Å. The Ni(1)-O(6) bond length is 2.12 Å. The Ni(1)-O(8) bond length is 2.14 Å. In the second Ni site, Ni(2) is bonded to one O(12), one O(14), one O(18), one O(19), one O(2), and one O(7) atom to form NiO6 octahedra that share corners with three equivalent Na(1)O6 octahedra, corners with three equivalent Na(7)O6 octahedra,  an edgeedge with one Na(5)O6 octahedra,  an edgeedge with one Na(6)O6 octahedra,  an edgeedge with one Ni(10)O6 octahedra,  an edgeedge with one Ni(11)O6 octahedra,  an edgeedge with one Ni(16)O6 octahedra,  an edgeedge with one Ni(4)O6 octahedra, edges with two equivalent Ni(14)O6 octahedra, edges with two equivalent Ni(5)O6 octahedra, and edges with two equivalent Ni(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 2-11°. The Ni(2)-O(12) bond length is 2.03 Å. The Ni(2)-O(14) bond length is 2.03 Å. The Ni(2)-O(18) bond length is 1.91 Å. The Ni(2)-O(19) bond length is 2.05 Å. The Ni(2)-O(2) bond length is 2.05 Å. The Ni(2)-O(7) bond length is 1.91 Å. In the third Ni site, Ni(3) is bonded to one O(1), one O(10), one O(13), one O(16), one O(21), and one O(9) atom to form NiO6 octahedra that share corners with three equivalent Na(2)O6 octahedra, corners with three equivalent Na(7)O6 octahedra,  an edgeedge with one Na(5)O6 octahedra,  an edgeedge with one Ni(11)O6 octahedra,  an edgeedge with one Ni(12)O6 octahedra,  an edgeedge with one Ni(17)O6 octahedra,  an edgeedge with one Ni(4)O6 octahedra,  an edgeedge with one Ni(9)O6 octahedra, edges with two equivalent Na(3)O6 octahedra, edges with two equivalent Ni(13)O6 octahedra, and edges with two equivalent Ni(8)O6 octahedra. The corner-sharing octahedral tilt angles range from 1-9°. The Ni(3)-O(1) bond length is 1.94 Å. The Ni(3)-O(10) bond length is 2.03 Å. The Ni(3)-O(13) bond length is 2.06 Å. The Ni(3)-O(16) bond length is 1.94 Å. The Ni(3)-O(21) bond length is 1.92 Å. The Ni(3)-O(9) bond length is 1.95 Å. In the fourth Ni site, Ni(4) is bonded to one O(10), one O(12), one O(16), one O(3), one O(5), and one O(7) atom to form NiO6 octahedra that share corners with three equivalent Ni(13)O6 octahedra, corners with three equivalent Ni(14)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra,  an edgeedge with one Ni(3)O6 octahedra,  an edgeedge with one Ni(5)O6 octahedra,  an edgeedge with one Ni(6)O6 octahedra,  an edgeedge with one Ni(8)O6 octahedra, edges with two equivalent Na(5)O6 octahedra, edges with two equivalent Na(7)O6 octahedra, and edges with two equivalent Ni(11)O6 octahedra. The corner-sharing octahedral tilt angles range from 7-13°. The Ni(4)-O(10) bond length is 2.11 Å. The Ni(4)-O(12) bond length is 2.15 Å. The Ni(4)-O(16) bond length is 2.16 Å. The Ni(4)-O(3) bond length is 2.10 Å. The Ni(4)-O(5) bond length is 2.22 Å. The Ni(4)-O(7) bond length is 2.16 Å. In the fifth Ni site, Ni(5) is bonded to one O(12), one O(14), one O(19), one O(2), one O(23), and one O(5) atom to form NiO6 octahedra that share corners with three equivalent Ni(10)O6 octahedra, corners with three equivalent Ni(11)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(5)O6 octahedra,  an edgeedge with one Na(6)O6 octahedra,  an edgeedge with one Na(7)O6 octahedra,  an edgeedge with one Ni(16)O6 octahedra,  an edgeedge with one Ni(4)O6 octahedra, edges with two equivalent Ni(14)O6 octahedra, edges with two equivalent Ni(2)O6 octahedra, and edges with two equivalent Ni(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 6-13°. The Ni(5)-O(12) bond length is 2.13 Å. The Ni(5)-O(14) bond length is 2.14 Å. The Ni(5)-O(19) bond length is 2.15 Å. The Ni(5)-O(2) bond length is 2.16 Å. The Ni(5)-O(23) bond length is 2.11 Å. The Ni(5)-O(5) bond length is 2.11 Å. In the sixth Ni site, Ni(6) is bonded to one O(18), one O(19), one O(2), one O(23), one O(5), and one O(7) atom to form NiO6 octahedra that share corners with three equivalent Na(5)O6 octahedra, corners with three equivalent Na(6)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(7)O6 octahedra,  an edgeedge with one Ni(10)O6 octahedra,  an edgeedge with one Ni(11)O6 octahedra,  an edgeedge with one Ni(16)O6 octahedra,  an edgeedge with one Ni(4)O6 octahedra, edges with two equivalent Ni(14)O6 octahedra, edges with two equivalent Ni(2)O6 octahedra, and edges with two equivalent Ni(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 1-11°. The Ni(6)-O(18) bond length is 2.10 Å. The Ni(6)-O(19) bond length is 1.91 Å. The Ni(6)-O(2) bond length is 1.91 Å. The Ni(6)-O(23) bond length is 1.96 Å. The Ni(6)-O(5) bond length is 1.96 Å. The Ni(6)-O(7) bond length is 2.10 Å. In the seventh Ni site, Ni(7) is bonded to one O(17), one O(20), one O(22), one O(4), one O(6), and one O(8) atom to form NiO6 octahedra that share corners with three equivalent Na(6)O6 octahedra, corners with three equivalent Ni(9)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Ni(10)O6 octahedra,  an edgeedge with one Ni(12)O6 octahedra,  an edgeedge with one Ni(16)O6 octahedra,  an edgeedge with one Ni(17)O6 octahedra, edges with two equivalent Na(4)O6 octahedra, edges with two equivalent Ni(1)O6 octahedra, and edges with two equivalent Ni(15)O6 octahedra. The corner-sharing octahedral tilt angles range from 7-13°. The Ni(7)-O(17) bond length is 2.16 Å. The Ni(7)-O(20) bond length is 2.05 Å. The Ni(7)-O(22) bond length is 2.13 Å. The Ni(7)-O(4) bond length is 2.18 Å. The Ni(7)-O(6) bond length is 2.05 Å. The Ni(7)-O(8) bond length is 2.06 Å. In the eighth Ni site, Ni(8) is bonded to one O(1), one O(16), one O(21), one O(24), one O(3), and one O(9) atom to form NiO6 octahedra that share corners with three equivalent Na(5)O6 octahedra, corners with three equivalent Ni(9)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Na(7)O6 octahedra,  an edgeedge with one Ni(11)O6 octahedra,  an edgeedge with one Ni(12)O6 octahedra,  an edgeedge with one Ni(17)O6 octahedra,  an edgeedge with one Ni(4)O6 octahedra, edges with two equivalent Na(3)O6 octahedra, edges with two equivalent Ni(13)O6 octahedra, and edges with two equivalent Ni(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 6-13°. The Ni(8)-O(1) bond length is 2.14 Å. The Ni(8)-O(16) bond length is 2.05 Å. The Ni(8)-O(21) bond length is 2.05 Å. The Ni(8)-O(24) bond length is 2.18 Å. The Ni(8)-O(3) bond length is 2.04 Å. The Ni(8)-O(9) bond length is 2.16 Å. In the ninth Ni site, Ni(9) is bonded to one O(1), one O(17), one O(22), one O(24), one O(4), and one O(9) atom to form NiO6 octahedra that share corners with three equivalent Ni(7)O6 octahedra, corners with three equivalent Ni(8)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(13)O6 octahedra,  an edgeedge with one Ni(15)O6 octahedra,  an edgeedge with one Ni(3)O6 octahedra, edges with two equivalent Na(2)O6 octahedra, edges with two equivalent Ni(12)O6 octahedra, and edges with two equivalent Ni(17)O6 octahedra. The corner-sharing octahedral tilt angles range from 9-12°. The Ni(9)-O(1) bond length is 2.10 Å. The Ni(9)-O(17) bond length is 2.11 Å. The Ni(9)-O(22) bond length is 2.11 Å. The Ni(9)-O(24) bond length is 2.15 Å. The Ni(9)-O(4) bond length is 2.15 Å. The Ni(9)-O(9) bond length is 2.10 Å. In the tenth Ni site, Ni(10) is bonded to one O(11), one O(14), one O(2), one O(20), one O(23), and one O(6) atom to form NiO6 octahedra that share corners with three equivalent Na(4)O6 octahedra, corners with three equivalent Ni(5)O6 octahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(14)O6 octahedra,  an edgeedge with one Ni(15)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra,  an edgeedge with one Ni(6)O6 octahedra,  an edgeedge with one Ni(7)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, edges with two equivalent Na(6)O6 octahedra, and edges with two equivalent Ni(16)O6 octahedra. The corner-sharing octahedral tilt angles range from 5-14°. The Ni(10)-O(11) bond length is 2.04 Å. The Ni(10)-O(14) bond length is 2.18 Å. The Ni(10)-O(2) bond length is 2.17 Å. The Ni(10)-O(20) bond length is 2.06 Å. The Ni(10)-O(23) bond length is 2.15 Å. The Ni(10)-O(6) bond length is 2.01 Å. In the eleventh Ni site, Ni(11) is bonded to one O(10), one O(12), one O(19), one O(21), one O(3), and one O(5) atom to form NiO6 octahedra that share corners with three equivalent Na(3)O6 octahedra, corners with three equivalent Ni(5)O6 octahedra,  an edgeedge with one Ni(13)O6 octahedra,  an edgeedge with one Ni(14)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra,  an edgeedge with one Ni(3)O6 octahedra,  an edgeedge with one Ni(6)O6 octahedra,  an edgeedge with one Ni(8)O6 octahedra, edges with two equivalent Na(5)O6 octahedra, edges with two equivalent Na(7)O6 octahedra, and edges with two equivalent Ni(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 5-14°. The Ni(11)-O(10) bond length is 2.03 Å. The Ni(11)-O(12) bond length is 2.19 Å. The Ni(11)-O(19) bond length is 2.17 Å. The Ni(11)-O(21) bond length is 2.05 Å. The Ni(11)-O(3) bond length is 2.01 Å. The Ni(11)-O(5) bond length is 2.15 Å. In the twelfth Ni site, Ni(12) is bonded to one O(1), one O(13), one O(15), one O(22), one O(24), and one O(4) atom to form NiO6 octahedra that share corners with three equivalent Na(3)O6 octahedra, corners with three equivalent Na(4)O6 octahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(13)O6 octahedra,  an edgeedge with one Ni(15)O6 octahedra,  an edgeedge with one Ni(3)O6 octahedra,  an edgeedge with one Ni(7)O6 octahedra,  an edgeedge with one Ni(8)O6 octahedra, edges with two equivalent Na(2)O6 octahedra, edges with two equivalent Ni(17)O6 octahedra, and edges with two equivalent Ni(9)O6 octahedra. The corner-sharing octahedral tilt angles range from 1-10°. The Ni(12)-O(1) bond length is 2.04 Å. The Ni(12)-O(13) bond length is 1.96 Å. The Ni(12)-O(15) bond length is 1.96 Å. The Ni(12)-O(22) bond length is 2.06 Å. The Ni(12)-O(24) bond length is 1.92 Å. The Ni(12)-O(4) bond length is 1.91 Å. In the thirteenth Ni site, Ni(13) is bonded to one O(10), one O(13), one O(16), one O(24), one O(3), and one O(9) atom to form NiO6 octahedra that share corners with three equivalent Ni(17)O6 octahedra, corners with three equivalent Ni(4)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Na(5)O6 octahedra,  an edgeedge with one Na(7)O6 octahedra,  an edgeedge with one Ni(11)O6 octahedra,  an edgeedge with one Ni(12)O6 octahedra,  an edgeedge with one Ni(9)O6 octahedra, edges with two equivalent Na(3)O6 octahedra, edges with two equivalent Ni(3)O6 octahedra, and edges with two equivalent Ni(8)O6 octahedra. The corner-sharing octahedral tilt angles range from 8-12°. The Ni(13)-O(10) bond length is 2.13 Å. The Ni(13)-O(13) bond length is 2.14 Å. The Ni(13)-O(16) bond length is 2.14 Å. The Ni(13)-O(24) bond length is 2.19 Å. The Ni(13)-O(3) bond length is 2.12 Å. The Ni(13)-O(9) bond length is 2.17 Å. In the fourteenth Ni site, Ni(14) is bonded to one O(12), one O(14), one O(18), one O(23), one O(5), and one O(7) atom to form NiO6 octahedra that share corners with three equivalent Ni(16)O6 octahedra, corners with three equivalent Ni(4)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(5)O6 octahedra,  an edgeedge with one Na(6)O6 octahedra,  an edgeedge with one Na(7)O6 octahedra,  an edgeedge with one Ni(10)O6 octahedra,  an edgeedge with one Ni(11)O6 octahedra, edges with two equivalent Ni(2)O6 octahedra, edges with two equivalent Ni(5)O6 octahedra, and edges with two equivalent Ni(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 6-13°. The Ni(14)-O(12) bond length is 2.11 Å. The Ni(14)-O(14) bond length is 2.11 Å. The Ni(14)-O(18) bond length is 2.16 Å. The Ni(14)-O(23) bond length is 2.16 Å. The Ni(14)-O(5) bond length is 2.15 Å. The Ni(14)-O(7) bond length is 2.16 Å. In the fifteenth Ni site, Ni(15) is bonded to one O(11), one O(15), one O(17), one O(20), one O(22), and one O(8) atom to form NiO6 octahedra that share corners with three equivalent Na(1)O6 octahedra, corners with three equivalent Na(2)O6 octahedra,  an edgeedge with one Na(6)O6 octahedra,  an edgeedge with one Ni(10)O6 octahedra,  an edgeedge with one Ni(12)O6 octahedra,  an edgeedge with one Ni(16)O6 octahedra,  an edgeedge with one Ni(17)O6 octahedra,  an edgeedge with one Ni(9)O6 octahedra, edges with two equivalent Na(4)O6 octahedra, edges with two equivalent Ni(1)O6 octahedra, and edges with two equivalent Ni(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 1-9°. The Ni(15)-O(11) bond length is 2.01 Å. The Ni(15)-O(15) bond length is 2.04 Å. The Ni(15)-O(17) bond length is 1.93 Å. The Ni(15)-O(20) bond length is 1.92 Å. The Ni(15)-O(22) bond length is 1.93 Å. The Ni(15)-O(8) bond length is 1.93 Å. In the sixteenth Ni site, Ni(16) is bonded to one O(11), one O(14), one O(18), one O(23), one O(6), and one O(8) atom to form NiO6 octahedra that share corners with three equivalent Ni(1)O6 octahedra, corners with three equivalent Ni(14)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Ni(15)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra,  an edgeedge with one Ni(5)O6 octahedra,  an edgeedge with one Ni(6)O6 octahedra,  an edgeedge with one Ni(7)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, edges with two equivalent Na(6)O6 octahedra, and edges with two equivalent Ni(10)O6 octahedra. The corner-sharing octahedral tilt angles range from 6-13°. The Ni(16)-O(11) bond length is 2.12 Å. The Ni(16)-O(14) bond length is 2.14 Å. The Ni(16)-O(18) bond length is 2.14 Å. The Ni(16)-O(23) bond length is 2.20 Å. The Ni(16)-O(6) bond length is 2.11 Å. The Ni(16)-O(8) bond length is 2.18 Å. In the seventeenth Ni site, Ni(17) is bonded to one O(13), one O(15), one O(17), one O(24), one O(4), and one O(9) atom to form NiO6 octahedra that share corners with three equivalent Ni(1)O6 octahedra, corners with three equivalent Ni(13)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Ni(15)O6 octahedra,  an edgeedge with one Ni(3)O6 octahedra,  an edgeedge with one Ni(7)O6 octahedra,  an edgeedge with one Ni(8)O6 octahedra, edges with two equivalent Na(2)O6 octahedra, edges with two equivalent Ni(12)O6 octahedra, and edges with two equivalent Ni(9)O6 octahedra. The corner-sharing octahedral tilt angles range from 8-13°. The Ni(17)-O(13) bond length is 2.12 Å. The Ni(17)-O(15) bond length is 2.12 Å. The Ni(17)-O(17) bond length is 2.17 Å. The Ni(17)-O(24) bond length is 2.14 Å. The Ni(17)-O(4) bond length is 2.13 Å. The Ni(17)-O(9) bond length is 2.15 Å. There are twenty-four inequivalent O sites. In the first O site, O(1) is bonded to one Na(2), one Na(3), one Ni(12), one Ni(3), one Ni(8), and one Ni(9) atom to form ONa2Ni4 octahedra that share corners with three equivalent O(22)Na2Ni4 octahedra, corners with three equivalent O(21)Na3Ni3 octahedra,  an edgeedge with one O(10)Na2Ni4 octahedra,  an edgeedge with one O(15)Na2Ni4 octahedra,  an edgeedge with one O(16)Na2Ni4 octahedra,  an edgeedge with one O(3)Na2Ni4 octahedra,  an edgeedge with one O(17)NaNi5 octahedra,  an edgeedge with one O(4)NaNi5 octahedra, edges with two equivalent O(13)Na2Ni4 octahedra, edges with two equivalent O(24)NaNi5 octahedra, and edges with two equivalent O(9)NaNi5 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the second O site, O(2) is bonded to one Na(1), one Na(6), one Ni(10), one Ni(2), one Ni(5), and one Ni(6) atom to form ONa2Ni4 octahedra that share corners with three equivalent O(19)Na2Ni4 octahedra, corners with three equivalent O(20)Na3Ni3 octahedra,  an edgeedge with one O(11)Na2Ni4 octahedra,  an edgeedge with one O(6)Na2Ni4 octahedra,  an edgeedge with one O(7)Na2Ni4 octahedra,  an edgeedge with one O(8)Na2Ni4 octahedra,  an edgeedge with one O(12)NaNi5 octahedra,  an edgeedge with one O(5)NaNi5 octahedra, edges with two equivalent O(18)Na2Ni4 octahedra, edges with two equivalent O(14)NaNi5 octahedra, and edges with two equivalent O(23)NaNi5 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. In the third O site, O(3) is bonded to one Na(3), one Na(5), one Ni(11), one Ni(13), one Ni(4), and one Ni(8) atom to form ONa2Ni4 octahedra that share corners with three equivalent O(24)NaNi5 octahedra, corners with three equivalent O(5)NaNi5 octahedra,  an edgeedge with one O(1)Na2Ni4 octahedra,  an edgeedge with one O(13)Na2Ni4 octahedra,  an edgeedge with one O(19)Na2Ni4 octahedra,  an edgeedge with one O(7)Na2Ni4 octahedra,  an edgeedge with one O(12)NaNi5 octahedra,  an edgeedge with one O(9)NaNi5 octahedra, edges with two equivalent O(10)Na2Ni4 octahedra, edges with two equivalent O(16)Na2Ni4 octahedra, and edges with two equivalent O(21)Na3Ni3 octahedra. The corner-sharing octahedral tilt angles range from 1-5°. In the fourth O site, O(4) is bonded to one Na(4), one Ni(1), one Ni(12), one Ni(17), one Ni(7), and one Ni(9) atom to form ONaNi5 octahedra that share corners with three equivalent O(6)Na2Ni4 octahedra, corners with three equivalent O(24)NaNi5 octahedra,  an edgeedge with one O(1)Na2Ni4 octahedra,  an edgeedge with one O(11)Na2Ni4 octahedra,  an edgeedge with one O(13)Na2Ni4 octahedra,  an edgeedge with one O(8)Na2Ni4 octahedra,  an edgeedge with one O(20)Na3Ni3 octahedra,  an edgeedge with one O(9)NaNi5 octahedra, edges with two equivalent O(15)Na2Ni4 octahedra, edges with two equivalent O(22)Na2Ni4 octahedra, and edges with two equivalent O(17)NaNi5 octahedra. The corner-sharing octahedral tilt angles range from 0-5°. In the fifth O site, O(5) is bonded to one Na(5), one Ni(11), one Ni(14), one Ni(4), one Ni(5), and one Ni(6) atom to form ONaNi5 octahedra that share corners with three equivalent O(3)Na2Ni4 octahedra, corners with three equivalent O(23)NaNi5 octahedra,  an edgeedge with one O(10)Na2Ni4 octahedra,  an edgeedge with one O(16)Na2Ni4 octahedra,  an edgeedge with one O(18)Na2Ni4 octahedra,  an edgeedge with one O(2)Na2Ni4 octahedra,  an edgeedge with one O(21)Na3Ni3 octahedra,  an edgeedge with one O(14)NaNi5 octahedra, edges with two equivalent O(19)Na2Ni4 octahedra, edges with two equivalent O(7)Na2Ni4 octahedra, and edges with two equivalent O(12)NaNi5 octahedra. The corner-sharing octahedral tilt angles range from 0-5°. In the sixth O site, O(6) is bonded to one Na(4), one Na(6), one Ni(1), one Ni(10), one Ni(16), and one Ni(7) atom to form ONa2Ni4 octahedra that share corners with three equivalent O(23)NaNi5 octahedra, corners with three equivalent O(4)NaNi5 octahedra,  an edgeedge with one O(15)Na2Ni4 octahedra,  an edgeedge with one O(18)Na2Ni4 octahedra,  an edgeedge with one O(2)Na2Ni4 octahedra,  an edgeedge with one O(22)Na2Ni4 octahedra,  an edgeedge with one O(14)NaNi5 octahedra,  an edgeedge with one O(17)NaNi5 octahedra, edges with two equivalent O(11)Na2Ni4 octahedra, edges with two equivalent O(8)Na2Ni4 octahedra, and edges with two equivalent O(20)Na3Ni3 octahedra. The corner-sharing octahedral tilt angles range from 1-5°. In the seventh O site, O(7) is bonded to one Na(5), one Na(7), one Ni(14), one Ni(2), one Ni(4), and one Ni(6) atom to form ONa2Ni4 octahedra that share corners with three equivalent O(16)Na2Ni4 octahedra, corners with three equivalent O(18)Na2Ni4 octahedra,  an edgeedge with one O(10)Na2Ni4 octahedra,  an edgeedge with one O(2)Na2Ni4 octahedra,  an edgeedge with one O(3)Na2Ni4 octahedra,  an edgeedge with one O(21)Na3Ni3 octahedra,  an edgeedge with one O(14)NaNi5 octahedra,  an edgeedge with one O(23)NaNi5 octahedra, edges with two equivalent O(19)Na2Ni4 octahedra, edges with two equivalent O(12)NaNi5 octahedra, and edges with two equivalent O(5)NaNi5 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the eighth O site, O(8) is bonded to one Na(1), one Na(6), one Ni(1), one Ni(15), one Ni(16), and one Ni(7) atom to form ONa2Ni4 octahedra that share corners with three equivalent O(18)Na2Ni4 octahedra, corners with three equivalent O(17)NaNi5 octahedra,  an edgeedge with one O(15)Na2Ni4 octahedra,  an edgeedge with one O(2)Na2Ni4 octahedra,  an edgeedge with one O(22)Na2Ni4 octahedra,  an edgeedge with one O(14)NaNi5 octahedra,  an edgeedge with one O(23)NaNi5 octahedra,  an edgeedge with one O(4)NaNi5 octahedra, edges with two equivalent O(11)Na2Ni4 octahedra, edges with two equivalent O(6)Na2Ni4 octahedra, and edges with two equivalent O(20)Na3Ni3 octahedra. The corner-sharing octahedral tilt angles range from 1-6°. In the ninth O site, O(9) is bonded to one Na(2), one Ni(13), one Ni(17), one Ni(3), one Ni(8), and one Ni(9) atom to form ONaNi5 octahedra that share corners with three equivalent O(16)Na2Ni4 octahedra, corners with three equivalent O(17)NaNi5 octahedra,  an edgeedge with one O(10)Na2Ni4 octahedra,  an edgeedge with one O(15)Na2Ni4 octahedra,  an edgeedge with one O(22)Na2Ni4 octahedra,  an edgeedge with one O(3)Na2Ni4 octahedra,  an edgeedge with one O(21)Na3Ni3 octahedra,  an edgeedge with one O(4)NaNi5 octahedra, edges with two equivalent O(1)Na2Ni4 octahedra, edges with two equivalent O(13)Na2Ni4 octahedra, and edges with two equivalent O(24)NaNi5 octahedra. The corner-sharing octahedral tilt angles range from 0-6°. In the tenth O site, O(10) is bonded to one Na(3), one Na(7), one Ni(11), one Ni(13), one Ni(3), and one Ni(4) atom to form ONa2Ni4 octahedra that share corners with three equivalent O(13)Na2Ni4 octahedra, corners with three equivalent O(12)NaNi5 octahedra,  an edgeedge with one O(1)Na2Ni4 octahedra,  an edgeedge with one O(19)Na2Ni4 octahedra,  an edgeedge with one O(7)Na2Ni4 octahedra,  an edgeedge with one O(24)NaNi5 octahedra,  an edgeedge with one O(5)NaNi5 octahedra,  an edgeedge with one O(9)NaNi5 octahedra, edges with two equivalent O(16)Na2Ni4 octahedra, edges with two equivalent O(3)Na2Ni4 octahedra, and edges with two equivalent O(21)Na3Ni3 octahedra. The corner-sharing octahedral tilt angles range from 1-6°. In the eleventh O site, O(11) is bonded to one Na(1), one Na(4), one Ni(1), one Ni(10), one Ni(15), and one Ni(16) atom to form ONa2Ni4 octahedra that share corners with three equivalent O(15)Na2Ni4 octahedra, corners with three equivalent O(14)NaNi5 octahedra,  an edgeedge with one O(18)Na2Ni4 octahedra,  an edgeedge with one O(2)Na2Ni4 octahedra,  an edgeedge with one O(22)Na2Ni4 octahedra,  an edgeedge with one O(17)NaNi5 octahedra,  an edgeedge with one O(23)NaNi5 octahedra,  an edgeedge with one O(4)NaNi5 octahedra, edges with two equivalent O(6)Na2Ni4 octahedra, edges with two equivalent O(8)Na2Ni4 octahedra, and edges with two equivalent O(20)Na3Ni3 octahedra. The corner-sharing octahedral tilt angles range from 1-6°. In the twelfth O site, O(12) is bonded to one Na(7), one Ni(11), one Ni(14), one Ni(2), one Ni(4), and one Ni(5) atom to form ONaNi5 octahedra that share corners with three equivalent O(10)Na2Ni4 octahedra, corners with three equivalent O(14)NaNi5 octahedra,  an edgeedge with one O(16)Na2Ni4 octahedra,  an edgeedge with one O(18)Na2Ni4 octahedra,  an edgeedge with one O(2)Na2Ni4 octahedra,  an edgeedge with one O(3)Na2Ni4 octahedra,  an edgeedge with one O(21)Na3Ni3 octahedra,  an edgeedge with one O(23)NaNi5 octahedra, edges with two equivalent O(19)Na2Ni4 octahedra, edges with two equivalent O(7)Na2Ni4 octahedra, and edges with two equivalent O(5)NaNi5 octahedra. The corner-sharing octahedral tilt angles range from 0-6°. In the thirteenth O site, O(13) is bonded to one Na(2), one Na(3), one Ni(12), one Ni(13), one Ni(17), and one Ni(3) atom to form ONa2Ni4 octahedra that share corners with three equivalent O(10)Na2Ni4 octahedra, corners with three equivalent O(15)Na2Ni4 octahedra,  an edgeedge with one O(16)Na2Ni4 octahedra,  an edgeedge with one O(22)Na2Ni4 octahedra,  an edgeedge with one O(3)Na2Ni4 octahedra,  an edgeedge with one O(21)Na3Ni3 octahedra,  an edgeedge with one O(17)NaNi5 octahedra,  an edgeedge with one O(4)NaNi5 octahedra, edges with two equivalent O(1)Na2Ni4 octahedra, edges with two equivalent O(24)NaNi5 octahedra, and edges with two equivalent O(9)NaNi5 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. In the fourteenth O site, O(14) is bonded to one Na(1), one Ni(10), one Ni(14), one Ni(16), one Ni(2), and one Ni(5) atom to form ONaNi5 octahedra that share corners with three equivalent O(11)Na2Ni4 octahedra, corners with three equivalent O(12)NaNi5 octahedra,  an edgeedge with one O(19)Na2Ni4 octahedra,  an edgeedge with one O(6)Na2Ni4 octahedra,  an edgeedge with one O(7)Na2Ni4 octahedra,  an edgeedge with one O(8)Na2Ni4 octahedra,  an edgeedge with one O(20)Na3Ni3 octahedra,  an edgeedge with one O(5)NaNi5 octahedra, edges with two equivalent O(18)Na2Ni4 octahedra, edges with two equivalent O(2)Na2Ni4 octahedra, and edges with two equivalent O(23)NaNi5 octahedra. The corner-sharing octahedral tilt angles range from 0-6°. In the fifteenth O site, O(15) is bonded to one Na(2), one Na(4), one Ni(1), one Ni(12), one Ni(15), and one Ni(17) atom to form ONa2Ni4 octahedra that share corners with three equivalent O(11)Na2Ni4 octahedra, corners with three equivalent O(13)Na2Ni4 octahedra,  an edgeedge with one O(1)Na2Ni4 octahedra,  an edgeedge with one O(6)Na2Ni4 octahedra,  an edgeedge with one O(8)Na2Ni4 octahedra,  an edgeedge with one O(20)Na3Ni3 octahedra,  an edgeedge with one O(24)NaNi5 octahedra,  an edgeedge with one O(9)NaNi5 octahedra, edges with two equivalent O(22)Na2Ni4 octahedra, edges with two equivalent O(17)NaNi5 octahedra, and edges with two equivalent O(4)NaNi5 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. In the sixteenth O site, O(16) is bonded to one Na(5), one Na(7), one Ni(13), one Ni(3), one Ni(4), and one Ni(8) atom to form ONa2Ni4 octahedra that share corners with three equivalent O(7)Na2Ni4 octahedra, corners with three equivalent O(9)NaNi5 octahedra,  an edgeedge with one O(1)Na2Ni4 octahedra,  an edgeedge with one O(13)Na2Ni4 octahedra,  an edgeedge with one O(19)Na2Ni4 octahedra,  an edgeedge with one O(12)NaNi5 octahedra,  an edgeedge with one O(24)NaNi5 octahedra,  an edgeedge with one O(5)NaNi5 octahedra, edges with two equivalent O(10)Na2Ni4 octahedra, edges with two equivalent O(3)Na2Ni4 octahedra, and edges with two equivalent O(21)Na3Ni3 octahedra. The corner-sharing octahedral tilt angles range from 1-6°. In the seventeenth O site, O(17) is bonded to one Na(2), one Ni(1), one Ni(15), one Ni(17), one Ni(7), and one Ni(9) atom to form ONaNi5 octahedra that share corners with three equivalent O(8)Na2Ni4 octahedra, corners with three equivalent O(9)NaNi5 octahedra,  an edgeedge with one O(1)Na2Ni4 octahedra,  an edgeedge with one O(11)Na2Ni4 octahedra,  an edgeedge with one O(13)Na2Ni4 octahedra,  an edgeedge with one O(6)Na2Ni4 octahedra,  an edgeedge with one O(20)Na3Ni3 octahedra,  an edgeedge with one O(24)NaNi5 octahedra, edges with two equivalent O(15)Na2Ni4 octahedra, edges with two equivalent O(22)Na2Ni4 octahedra, and edges with two equivalent O(4)NaNi5 octahedra. The corner-sharing octahedral tilt angles range from 0-6°. In the eighteenth O site, O(18) is bonded to one Na(1), one Na(6), one Ni(14), one Ni(16), one Ni(2), and one Ni(6) atom to form ONa2Ni4 octahedra that share corners with three equivalent O(7)Na2Ni4 octahedra, corners with three equivalent O(8)Na2Ni4 octahedra,  an edgeedge with one O(11)Na2Ni4 octahedra,  an edgeedge with one O(19)Na2Ni4 octahedra,  an edgeedge with one O(6)Na2Ni4 octahedra,  an edgeedge with one O(20)Na3Ni3 octahedra,  an edgeedge with one O(12)NaNi5 octahedra,  an edgeedge with one O(5)NaNi5 octahedra, edges with two equivalent O(2)Na2Ni4 octahedra, edges with two equivalent O(14)NaNi5 octahedra, and edges with two equivalent O(23)NaNi5 octahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the nineteenth O site, O(19) is bonded to one Na(5), one Na(7), one Ni(11), one Ni(2), one Ni(5), and one Ni(6) atom to form ONa2Ni4 octahedra that share corners with three equivalent O(2)Na2Ni4 octahedra, corners with three equivalent O(21)Na3Ni3 octahedra,  an edgeedge with one O(10)Na2Ni4 octahedra,  an edgeedge with one O(16)Na2Ni4 octahedra,  an edgeedge with one O(18)Na2Ni4 octahedra,  an edgeedge with one O(3)Na2Ni4 octahedra,  an edgeedge with one O(14)NaNi5 octahedra,  an edgeedge with one O(23)NaNi5 octahedra, edges with two equivalent O(7)Na2Ni4 octahedra, edges with two equivalent O(12)NaNi5 octahedra, and edges with two equivalent O(5)NaNi5 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. In the twentieth O site, O(20) is bonded to one Na(1), one Na(4), one Na(6), one Ni(10), one Ni(15), and one Ni(7) atom to form ONa3Ni3 octahedra that share corners with three equivalent O(2)Na2Ni4 octahedra, corners with three equivalent O(22)Na2Ni4 octahedra,  an edgeedge with one O(15)Na2Ni4 octahedra,  an edgeedge with one O(18)Na2Ni4 octahedra,  an edgeedge with one O(14)NaNi5 octahedra,  an edgeedge with one O(17)NaNi5 octahedra,  an edgeedge with one O(23)NaNi5 octahedra,  an edgeedge with one O(4)NaNi5 octahedra, edges with two equivalent O(11)Na2Ni4 octahedra, edges with two equivalent O(6)Na2Ni4 octahedra, and edges with two equivalent O(8)Na2Ni4 octahedra. The corner-sharing octahedral tilt angles range from 1-4°. In the twenty-first O site, O(21) is bonded to one Na(3), one Na(5), one Na(7), one Ni(11), one Ni(3), and one Ni(8) atom to form ONa3Ni3 octahedra that share corners with three equivalent O(1)Na2Ni4 octahedra, corners with three equivalent O(19)Na2Ni4 octahedra,  an edgeedge with one O(13)Na2Ni4 octahedra,  an edgeedge with one O(7)Na2Ni4 octahedra,  an edgeedge with one O(12)NaNi5 octahedra,  an edgeedge with one O(24)NaNi5 octahedra,  an edgeedge with one O(5)NaNi5 octahedra,  an edgeedge with one O(9)NaNi5 octahedra, edges with two equivalent O(10)Na2Ni4 octahedra, edges with two equivalent O(16)Na2Ni4 octahedra, and edges with two equivalent O(3)Na2Ni4 octahedra. The corner-sharing octahedral tilt angles range from 1-4°. In the twenty-second O site, O(22) is bonded to one Na(2), one Na(4), one Ni(12), one Ni(15), one Ni(7), and one Ni(9) atom to form ONa2Ni4 octahedra that share corners with three equivalent O(1)Na2Ni4 octahedra, corners with three equivalent O(20)Na3Ni3 octahedra,  an edgeedge with one O(11)Na2Ni4 octahedra,  an edgeedge with one O(13)Na2Ni4 octahedra,  an edgeedge with one O(6)Na2Ni4 octahedra,  an edgeedge with one O(8)Na2Ni4 octahedra,  an edgeedge with one O(24)NaNi5 octahedra,  an edgeedge with one O(9)NaNi5 octahedra, edges with two equivalent O(15)Na2Ni4 octahedra, edges with two equivalent O(17)NaNi5 octahedra, and edges with two equivalent O(4)NaNi5 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the twenty-third O site, O(23) is bonded to one Na(6), one Ni(10), one Ni(14), one Ni(16), one Ni(5), and one Ni(6) atom to form ONaNi5 octahedra that share corners with three equivalent O(6)Na2Ni4 octahedra, corners with three equivalent O(5)NaNi5 octahedra,  an edgeedge with one O(11)Na2Ni4 octahedra,  an edgeedge with one O(19)Na2Ni4 octahedra,  an edgeedge with one O(7)Na2Ni4 octahedra,  an edgeedge with one O(8)Na2Ni4 octahedra,  an edgeedge with one O(20)Na3Ni3 octahedra,  an edgeedge with one O(12)NaNi5 octahedra, edges with two equivalent O(18)Na2Ni4 octahedra, edges with two equivalent O(2)Na2Ni4 octahedra, and edges with two equivalent O(14)NaNi5 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. In the twenty-fourth O site, O(24) is bonded to one Na(3), one Ni(12), one Ni(13), one Ni(17), one Ni(8), and one Ni(9) atom to form ONaNi5 octahedra that share corners with three equivalent O(3)Na2Ni4 octahedra, corners with three equivalent O(4)NaNi5 octahedra,  an edgeedge with one O(10)Na2Ni4 octahedra,  an edgeedge with one O(15)Na2Ni4 octahedra,  an edgeedge with one O(16)Na2Ni4 octahedra,  an edgeedge with one O(22)Na2Ni4 octahedra,  an edgeedge with one O(21)Na3Ni3 octahedra,  an edgeedge with one O(17)NaNi5 octahedra, edges with two equivalent O(1)Na2Ni4 octahedra, edges with two equivalent O(13)Na2Ni4 octahedra, and edges with two equivalent O(9)NaNi5 octahedra. The corner-sharing octahedral tilt angles range from 0-5°.