NaCo3O4 is Caswellsilverite-like structured and crystallizes in the triclinic P1 space group. There are four inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(7), and one O(8) atom to form NaO6 octahedra that share corners with two equivalent Co(5)O6 octahedra, corners with four equivalent Co(10)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra,  an edgeedge with one Co(2)O6 octahedra,  an edgeedge with one Co(3)O6 octahedra,  an edgeedge with one Co(4)O6 octahedra,  an edgeedge with one Co(8)O6 octahedra,  an edgeedge with one Co(9)O6 octahedra, edges with two equivalent Co(12)O6 octahedra, and edges with two equivalent Co(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-10°. In the second Na site, Na(2) is bonded to one O(12), one O(13), one O(3), one O(5), one O(7), and one O(9) atom to form NaO6 octahedra that share corners with two equivalent Co(8)O6 octahedra, corners with four equivalent Co(2)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Co(10)O6 octahedra,  an edgeedge with one Co(11)O6 octahedra,  an edgeedge with one Co(12)O6 octahedra,  an edgeedge with one Co(5)O6 octahedra,  an edgeedge with one Co(6)O6 octahedra,  an edgeedge with one Co(7)O6 octahedra, edges with two equivalent Co(1)O6 octahedra, and edges with two equivalent Co(9)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-10°. In the third Na site, Na(3) is bonded to one O(10), one O(11), one O(14), one O(4), one O(6), and one O(8) atom to form NaO6 octahedra that share corners with two equivalent Co(9)O6 octahedra, corners with four equivalent Co(3)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Co(10)O6 octahedra,  an edgeedge with one Co(11)O6 octahedra,  an edgeedge with one Co(12)O6 octahedra,  an edgeedge with one Co(5)O6 octahedra,  an edgeedge with one Co(6)O6 octahedra,  an edgeedge with one Co(7)O6 octahedra, edges with two equivalent Co(4)O6 octahedra, and edges with two equivalent Co(8)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-10°. In the fourth Na site, Na(4) is bonded to one O(10), one O(13), one O(14), one O(15), one O(16), and one O(9) atom to form NaO6 octahedra that share corners with two equivalent Co(12)O6 octahedra, corners with four equivalent Co(7)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra,  an edgeedge with one Co(2)O6 octahedra,  an edgeedge with one Co(3)O6 octahedra,  an edgeedge with one Co(4)O6 octahedra,  an edgeedge with one Co(8)O6 octahedra,  an edgeedge with one Co(9)O6 octahedra, edges with two equivalent Co(11)O6 octahedra, and edges with two equivalent Co(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-10°. There are twelve inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(12), one O(13), one O(15), one O(3), and one O(5) atom to form CoO6 octahedra that share corners with two equivalent Co(3)O6 octahedra, corners with four equivalent Co(9)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Co(10)O6 octahedra,  an edgeedge with one Co(11)O6 octahedra,  an edgeedge with one Co(12)O6 octahedra,  an edgeedge with one Co(5)O6 octahedra,  an edgeedge with one Co(6)O6 octahedra,  an edgeedge with one Co(7)O6 octahedra, edges with two equivalent Na(2)O6 octahedra, and edges with two equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 10-13°. In the second Co site, Co(2) is bonded to one O(12), one O(13), one O(16), one O(2), one O(3), and one O(5) atom to form CoO6 octahedra that share corners with two equivalent Co(4)O6 octahedra, corners with four equivalent Na(2)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Co(10)O6 octahedra,  an edgeedge with one Co(11)O6 octahedra,  an edgeedge with one Co(12)O6 octahedra,  an edgeedge with one Co(5)O6 octahedra,  an edgeedge with one Co(6)O6 octahedra,  an edgeedge with one Co(7)O6 octahedra, edges with two equivalent Co(1)O6 octahedra, and edges with two equivalent Co(9)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-10°. In the third Co site, Co(3) is bonded to one O(1), one O(11), one O(14), one O(15), one O(4), and one O(6) atom to form CoO6 octahedra that share corners with two equivalent Co(1)O6 octahedra, corners with four equivalent Na(3)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Co(10)O6 octahedra,  an edgeedge with one Co(11)O6 octahedra,  an edgeedge with one Co(12)O6 octahedra,  an edgeedge with one Co(5)O6 octahedra,  an edgeedge with one Co(6)O6 octahedra,  an edgeedge with one Co(7)O6 octahedra, edges with two equivalent Co(4)O6 octahedra, and edges with two equivalent Co(8)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-10°. In the fourth Co site, Co(4) is bonded to one O(11), one O(14), one O(16), one O(2), one O(4), and one O(6) atom to form CoO6 octahedra that share corners with two equivalent Co(2)O6 octahedra, corners with four equivalent Co(8)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Co(10)O6 octahedra,  an edgeedge with one Co(11)O6 octahedra,  an edgeedge with one Co(12)O6 octahedra,  an edgeedge with one Co(5)O6 octahedra,  an edgeedge with one Co(6)O6 octahedra,  an edgeedge with one Co(7)O6 octahedra, edges with two equivalent Na(3)O6 octahedra, and edges with two equivalent Co(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 10-13°. In the fifth Co site, Co(5) is bonded to one O(10), one O(15), one O(16), one O(3), one O(4), and one O(9) atom to form CoO6 octahedra that share corners with two equivalent Na(1)O6 octahedra, corners with four equivalent Co(11)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra,  an edgeedge with one Co(2)O6 octahedra,  an edgeedge with one Co(3)O6 octahedra,  an edgeedge with one Co(4)O6 octahedra,  an edgeedge with one Co(8)O6 octahedra,  an edgeedge with one Co(9)O6 octahedra, edges with two equivalent Na(4)O6 octahedra, and edges with two equivalent Co(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 10-13°. In the sixth Co site, Co(6) is bonded to one O(1), one O(2), one O(5), one O(6), one O(7), and one O(8) atom to form CoO6 octahedra that share corners with two equivalent Co(7)O6 octahedra, corners with four equivalent Co(12)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra,  an edgeedge with one Co(2)O6 octahedra,  an edgeedge with one Co(3)O6 octahedra,  an edgeedge with one Co(4)O6 octahedra,  an edgeedge with one Co(8)O6 octahedra,  an edgeedge with one Co(9)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, and edges with two equivalent Co(10)O6 octahedra. The corner-sharing octahedral tilt angles range from 10-13°. In the seventh Co site, Co(7) is bonded to one O(10), one O(15), one O(16), one O(5), one O(6), and one O(9) atom to form CoO6 octahedra that share corners with two equivalent Co(6)O6 octahedra, corners with four equivalent Na(4)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra,  an edgeedge with one Co(2)O6 octahedra,  an edgeedge with one Co(3)O6 octahedra,  an edgeedge with one Co(4)O6 octahedra,  an edgeedge with one Co(8)O6 octahedra,  an edgeedge with one Co(9)O6 octahedra, edges with two equivalent Co(11)O6 octahedra, and edges with two equivalent Co(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-10°. In the eighth Co site, Co(8) is bonded to one O(11), one O(14), one O(4), one O(6), one O(7), and one O(9) atom to form CoO6 octahedra that share corners with two equivalent Na(2)O6 octahedra, corners with four equivalent Co(4)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Co(10)O6 octahedra,  an edgeedge with one Co(11)O6 octahedra,  an edgeedge with one Co(12)O6 octahedra,  an edgeedge with one Co(5)O6 octahedra,  an edgeedge with one Co(6)O6 octahedra,  an edgeedge with one Co(7)O6 octahedra, edges with two equivalent Na(3)O6 octahedra, and edges with two equivalent Co(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 10-13°. In the ninth Co site, Co(9) is bonded to one O(10), one O(12), one O(13), one O(3), one O(5), and one O(8) atom to form CoO6 octahedra that share corners with two equivalent Na(3)O6 octahedra, corners with four equivalent Co(1)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Co(10)O6 octahedra,  an edgeedge with one Co(11)O6 octahedra,  an edgeedge with one Co(12)O6 octahedra,  an edgeedge with one Co(5)O6 octahedra,  an edgeedge with one Co(6)O6 octahedra,  an edgeedge with one Co(7)O6 octahedra, edges with two equivalent Na(2)O6 octahedra, and edges with two equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 10-13°. In the tenth Co site, Co(10) is bonded to one O(1), one O(11), one O(12), one O(2), one O(7), and one O(8) atom to form CoO6 octahedra that share corners with two equivalent Co(11)O6 octahedra, corners with four equivalent Na(1)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra,  an edgeedge with one Co(2)O6 octahedra,  an edgeedge with one Co(3)O6 octahedra,  an edgeedge with one Co(4)O6 octahedra,  an edgeedge with one Co(8)O6 octahedra,  an edgeedge with one Co(9)O6 octahedra, edges with two equivalent Co(12)O6 octahedra, and edges with two equivalent Co(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-10°. In the eleventh Co site, Co(11) is bonded to one O(10), one O(11), one O(12), one O(15), one O(16), and one O(9) atom to form CoO6 octahedra that share corners with two equivalent Co(10)O6 octahedra, corners with four equivalent Co(5)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra,  an edgeedge with one Co(2)O6 octahedra,  an edgeedge with one Co(3)O6 octahedra,  an edgeedge with one Co(4)O6 octahedra,  an edgeedge with one Co(8)O6 octahedra,  an edgeedge with one Co(9)O6 octahedra, edges with two equivalent Na(4)O6 octahedra, and edges with two equivalent Co(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 10-13°. In the twelfth Co site, Co(12) is bonded to one O(1), one O(13), one O(14), one O(2), one O(7), and one O(8) atom to form CoO6 octahedra that share corners with two equivalent Na(4)O6 octahedra, corners with four equivalent Co(6)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra,  an edgeedge with one Co(2)O6 octahedra,  an edgeedge with one Co(3)O6 octahedra,  an edgeedge with one Co(4)O6 octahedra,  an edgeedge with one Co(8)O6 octahedra,  an edgeedge with one Co(9)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, and edges with two equivalent Co(10)O6 octahedra. The corner-sharing octahedral tilt angles range from 10-13°. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), one Co(1), one Co(10), one Co(12), one Co(3), and one Co(6) atom to form ONaCo5 octahedra that share corners with two equivalent O(15)NaCo5 octahedra, corners with four equivalent O(8)Na2Co4 octahedra,  an edgeedge with one O(13)Na2Co4 octahedra,  an edgeedge with one O(14)Na2Co4 octahedra,  an edgeedge with one O(3)Na2Co4 octahedra,  an edgeedge with one O(4)Na2Co4 octahedra,  an edgeedge with one O(11)NaCo5 octahedra,  an edgeedge with one O(12)NaCo5 octahedra,  an edgeedge with one O(5)NaCo5 octahedra,  an edgeedge with one O(6)NaCo5 octahedra, edges with two equivalent O(7)Na2Co4 octahedra, and edges with two equivalent O(2)NaCo5 octahedra. The corner-sharing octahedral tilt angles range from 6-8°. In the second O site, O(2) is bonded to one Na(1), one Co(10), one Co(12), one Co(2), one Co(4), and one Co(6) atom to form ONaCo5 octahedra that share corners with two equivalent O(16)NaCo5 octahedra, corners with four equivalent O(7)Na2Co4 octahedra,  an edgeedge with one O(13)Na2Co4 octahedra,  an edgeedge with one O(14)Na2Co4 octahedra,  an edgeedge with one O(3)Na2Co4 octahedra,  an edgeedge with one O(4)Na2Co4 octahedra,  an edgeedge with one O(11)NaCo5 octahedra,  an edgeedge with one O(12)NaCo5 octahedra,  an edgeedge with one O(5)NaCo5 octahedra,  an edgeedge with one O(6)NaCo5 octahedra, edges with two equivalent O(8)Na2Co4 octahedra, and edges with two equivalent O(1)NaCo5 octahedra. The corner-sharing octahedral tilt angles range from 6-9°. In the third O site, O(3) is bonded to one Na(1), one Na(2), one Co(1), one Co(2), one Co(5), and one Co(9) atom to form ONa2Co4 octahedra that share corners with two equivalent O(4)Na2Co4 octahedra, corners with four equivalent O(12)NaCo5 octahedra,  an edgeedge with one O(10)Na2Co4 octahedra,  an edgeedge with one O(7)Na2Co4 octahedra,  an edgeedge with one O(8)Na2Co4 octahedra,  an edgeedge with one O(9)Na2Co4 octahedra,  an edgeedge with one O(1)NaCo5 octahedra,  an edgeedge with one O(15)NaCo5 octahedra,  an edgeedge with one O(16)NaCo5 octahedra,  an edgeedge with one O(2)NaCo5 octahedra, edges with two equivalent O(13)Na2Co4 octahedra, and edges with two equivalent O(5)NaCo5 octahedra. The corner-sharing octahedral tilt angles range from 5-9°. In the fourth O site, O(4) is bonded to one Na(1), one Na(3), one Co(3), one Co(4), one Co(5), and one Co(8) atom to form ONa2Co4 octahedra that share corners with two equivalent O(3)Na2Co4 octahedra, corners with four equivalent O(11)NaCo5 octahedra,  an edgeedge with one O(10)Na2Co4 octahedra,  an edgeedge with one O(7)Na2Co4 octahedra,  an edgeedge with one O(8)Na2Co4 octahedra,  an edgeedge with one O(9)Na2Co4 octahedra,  an edgeedge with one O(1)NaCo5 octahedra,  an edgeedge with one O(15)NaCo5 octahedra,  an edgeedge with one O(16)NaCo5 octahedra,  an edgeedge with one O(2)NaCo5 octahedra, edges with two equivalent O(14)Na2Co4 octahedra, and edges with two equivalent O(6)NaCo5 octahedra. The corner-sharing octahedral tilt angles range from 5-9°. In the fifth O site, O(5) is bonded to one Na(2), one Co(1), one Co(2), one Co(6), one Co(7), and one Co(9) atom to form ONaCo5 octahedra that share corners with two equivalent O(6)NaCo5 octahedra, corners with four equivalent O(13)Na2Co4 octahedra,  an edgeedge with one O(10)Na2Co4 octahedra,  an edgeedge with one O(7)Na2Co4 octahedra,  an edgeedge with one O(8)Na2Co4 octahedra,  an edgeedge with one O(9)Na2Co4 octahedra,  an edgeedge with one O(1)NaCo5 octahedra,  an edgeedge with one O(15)NaCo5 octahedra,  an edgeedge with one O(16)NaCo5 octahedra,  an edgeedge with one O(2)NaCo5 octahedra, edges with two equivalent O(3)Na2Co4 octahedra, and edges with two equivalent O(12)NaCo5 octahedra. The corner-sharing octahedral tilt angles range from 6-8°. In the sixth O site, O(6) is bonded to one Na(3), one Co(3), one Co(4), one Co(6), one Co(7), and one Co(8) atom to form ONaCo5 octahedra that share corners with two equivalent O(5)NaCo5 octahedra, corners with four equivalent O(14)Na2Co4 octahedra,  an edgeedge with one O(10)Na2Co4 octahedra,  an edgeedge with one O(7)Na2Co4 octahedra,  an edgeedge with one O(8)Na2Co4 octahedra,  an edgeedge with one O(9)Na2Co4 octahedra,  an edgeedge with one O(1)NaCo5 octahedra,  an edgeedge with one O(15)NaCo5 octahedra,  an edgeedge with one O(16)NaCo5 octahedra,  an edgeedge with one O(2)NaCo5 octahedra, edges with two equivalent O(4)Na2Co4 octahedra, and edges with two equivalent O(11)NaCo5 octahedra. The corner-sharing octahedral tilt angles range from 6-8°. In the seventh O site, O(7) is bonded to one Na(1), one Na(2), one Co(10), one Co(12), one Co(6), and one Co(8) atom to form ONa2Co4 octahedra that share corners with two equivalent O(9)Na2Co4 octahedra, corners with four equivalent O(2)NaCo5 octahedra,  an edgeedge with one O(13)Na2Co4 octahedra,  an edgeedge with one O(14)Na2Co4 octahedra,  an edgeedge with one O(3)Na2Co4 octahedra,  an edgeedge with one O(4)Na2Co4 octahedra,  an edgeedge with one O(11)NaCo5 octahedra,  an edgeedge with one O(12)NaCo5 octahedra,  an edgeedge with one O(5)NaCo5 octahedra,  an edgeedge with one O(6)NaCo5 octahedra, edges with two equivalent O(8)Na2Co4 octahedra, and edges with two equivalent O(1)NaCo5 octahedra. The corner-sharing octahedral tilt angles range from 5-9°. In the eighth O site, O(8) is bonded to one Na(1), one Na(3), one Co(10), one Co(12), one Co(6), and one Co(9) atom to form ONa2Co4 octahedra that share corners with two equivalent O(10)Na2Co4 octahedra, corners with four equivalent O(1)NaCo5 octahedra,  an edgeedge with one O(13)Na2Co4 octahedra,  an edgeedge with one O(14)Na2Co4 octahedra,  an edgeedge with one O(3)Na2Co4 octahedra,  an edgeedge with one O(4)Na2Co4 octahedra,  an edgeedge with one O(11)NaCo5 octahedra,  an edgeedge with one O(12)NaCo5 octahedra,  an edgeedge with one O(5)NaCo5 octahedra,  an edgeedge with one O(6)NaCo5 octahedra, edges with two equivalent O(7)Na2Co4 octahedra, and edges with two equivalent O(2)NaCo5 octahedra. The corner-sharing octahedral tilt angles range from 4-8°. In the ninth O site, O(9) is bonded to one Na(2), one Na(4), one Co(11), one Co(5), one Co(7), and one Co(8) atom to form ONa2Co4 octahedra that share corners with two equivalent O(7)Na2Co4 octahedra, corners with four equivalent O(16)NaCo5 octahedra,  an edgeedge with one O(13)Na2Co4 octahedra,  an edgeedge with one O(14)Na2Co4 octahedra,  an edgeedge with one O(3)Na2Co4 octahedra,  an edgeedge with one O(4)Na2Co4 octahedra,  an edgeedge with one O(11)NaCo5 octahedra,  an edgeedge with one O(12)NaCo5 octahedra,  an edgeedge with one O(5)NaCo5 octahedra,  an edgeedge with one O(6)NaCo5 octahedra, edges with two equivalent O(10)Na2Co4 octahedra, and edges with two equivalent O(15)NaCo5 octahedra. The corner-sharing octahedral tilt angles range from 5-9°. In the tenth O site, O(10) is bonded to one Na(3), one Na(4), one Co(11), one Co(5), one Co(7), and one Co(9) atom to form ONa2Co4 octahedra that share corners with two equivalent O(8)Na2Co4 octahedra, corners with four equivalent O(15)NaCo5 octahedra,  an edgeedge with one O(13)Na2Co4 octahedra,  an edgeedge with one O(14)Na2Co4 octahedra,  an edgeedge with one O(3)Na2Co4 octahedra,  an edgeedge with one O(4)Na2Co4 octahedra,  an edgeedge with one O(11)NaCo5 octahedra,  an edgeedge with one O(12)NaCo5 octahedra,  an edgeedge with one O(5)NaCo5 octahedra,  an edgeedge with one O(6)NaCo5 octahedra, edges with two equivalent O(9)Na2Co4 octahedra, and edges with two equivalent O(16)NaCo5 octahedra. The corner-sharing octahedral tilt angles range from 4-8°. In the eleventh O site, O(11) is bonded to one Na(3), one Co(10), one Co(11), one Co(3), one Co(4), and one Co(8) atom to form ONaCo5 octahedra that share corners with two equivalent O(12)NaCo5 octahedra, corners with four equivalent O(4)Na2Co4 octahedra,  an edgeedge with one O(10)Na2Co4 octahedra,  an edgeedge with one O(7)Na2Co4 octahedra,  an edgeedge with one O(8)Na2Co4 octahedra,  an edgeedge with one O(9)Na2Co4 octahedra,  an edgeedge with one O(1)NaCo5 octahedra,  an edgeedge with one O(15)NaCo5 octahedra,  an edgeedge with one O(16)NaCo5 octahedra,  an edgeedge with one O(2)NaCo5 octahedra, edges with two equivalent O(14)Na2Co4 octahedra, and edges with two equivalent O(6)NaCo5 octahedra. The corner-sharing octahedral tilt angles range from 6-9°. In the twelfth O site, O(12) is bonded to one Na(2), one Co(1), one Co(10), one Co(11), one Co(2), and one Co(9) atom to form ONaCo5 octahedra that share corners with two equivalent O(11)NaCo5 octahedra, corners with four equivalent O(3)Na2Co4 octahedra,  an edgeedge with one O(10)Na2Co4 octahedra,  an edgeedge with one O(7)Na2Co4 octahedra,  an edgeedge with one O(8)Na2Co4 octahedra,  an edgeedge with one O(9)Na2Co4 octahedra,  an edgeedge with one O(1)NaCo5 octahedra,  an edgeedge with one O(15)NaCo5 octahedra,  an edgeedge with one O(16)NaCo5 octahedra,  an edgeedge with one O(2)NaCo5 octahedra, edges with two equivalent O(13)Na2Co4 octahedra, and edges with two equivalent O(5)NaCo5 octahedra. The corner-sharing octahedral tilt angles range from 6-9°. In the thirteenth O site, O(13) is bonded to one Na(2), one Na(4), one Co(1), one Co(12), one Co(2), and one Co(9) atom to form ONa2Co4 octahedra that share corners with two equivalent O(14)Na2Co4 octahedra, corners with four equivalent O(5)NaCo5 octahedra,  an edgeedge with one O(10)Na2Co4 octahedra,  an edgeedge with one O(7)Na2Co4 octahedra,  an edgeedge with one O(8)Na2Co4 octahedra,  an edgeedge with one O(9)Na2Co4 octahedra,  an edgeedge with one O(1)NaCo5 octahedra,  an edgeedge with one O(15)NaCo5 octahedra,  an edgeedge with one O(16)NaCo5 octahedra,  an edgeedge with one O(2)NaCo5 octahedra, edges with two equivalent O(3)Na2Co4 octahedra, and edges with two equivalent O(12)NaCo5 octahedra. The corner-sharing octahedral tilt angles range from 4-9°. In the fourteenth O site, O(14) is bonded to one Na(3), one Na(4), one Co(12), one Co(3), one Co(4), and one Co(8) atom to form ONa2Co4 octahedra that share corners with two equivalent O(13)Na2Co4 octahedra, corners with four equivalent O(6)NaCo5 octahedra,  an edgeedge with one O(10)Na2Co4 octahedra,  an edgeedge with one O(7)Na2Co4 octahedra,  an edgeedge with one O(8)Na2Co4 octahedra,  an edgeedge with one O(9)Na2Co4 octahedra,  an edgeedge with one O(1)NaCo5 octahedra,  an edgeedge with one O(15)NaCo5 octahedra,  an edgeedge with one O(16)NaCo5 octahedra,  an edgeedge with one O(2)NaCo5 octahedra, edges with two equivalent O(4)Na2Co4 octahedra, and edges with two equivalent O(11)NaCo5 octahedra. The corner-sharing octahedral tilt angles range from 4-9°. In the fifteenth O site, O(15) is bonded to one Na(4), one Co(1), one Co(11), one Co(3), one Co(5), and one Co(7) atom to form ONaCo5 octahedra that share corners with two equivalent O(1)NaCo5 octahedra, corners with four equivalent O(10)Na2Co4 octahedra,  an edgeedge with one O(13)Na2Co4 octahedra,  an edgeedge with one O(14)Na2Co4 octahedra,  an edgeedge with one O(3)Na2Co4 octahedra,  an edgeedge with one O(4)Na2Co4 octahedra,  an edgeedge with one O(11)NaCo5 octahedra,  an edgeedge with one O(12)NaCo5 octahedra,  an edgeedge with one O(5)NaCo5 octahedra,  an edgeedge with one O(6)NaCo5 octahedra, edges with two equivalent O(9)Na2Co4 octahedra, and edges with two equivalent O(16)NaCo5 octahedra. The corner-sharing octahedral tilt angles range from 6-8°. In the sixteenth O site, O(16) is bonded to one Na(4), one Co(11), one Co(2), one Co(4), one Co(5), and one Co(7) atom to form ONaCo5 octahedra that share corners with two equivalent O(2)NaCo5 octahedra, corners with four equivalent O(9)Na2Co4 octahedra,  an edgeedge with one O(13)Na2Co4 octahedra,  an edgeedge with one O(14)Na2Co4 octahedra,  an edgeedge with one O(3)Na2Co4 octahedra,  an edgeedge with one O(4)Na2Co4 octahedra,  an edgeedge with one O(11)NaCo5 octahedra,  an edgeedge with one O(12)NaCo5 octahedra,  an edgeedge with one O(5)NaCo5 octahedra,  an edgeedge with one O(6)NaCo5 octahedra, edges with two equivalent O(10)Na2Co4 octahedra, and edges with two equivalent O(15)NaCo5 octahedra. The corner-sharing octahedral tilt angles range from 6-9°.
NaCo3O4 is Caswellsilverite-like structured and crystallizes in the triclinic P1 space group. There are four inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(7), and one O(8) atom to form NaO6 octahedra that share corners with two equivalent Co(5)O6 octahedra, corners with four equivalent Co(10)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra,  an edgeedge with one Co(2)O6 octahedra,  an edgeedge with one Co(3)O6 octahedra,  an edgeedge with one Co(4)O6 octahedra,  an edgeedge with one Co(8)O6 octahedra,  an edgeedge with one Co(9)O6 octahedra, edges with two equivalent Co(12)O6 octahedra, and edges with two equivalent Co(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-10°. The Na(1)-O(1) bond length is 2.36 Å. The Na(1)-O(2) bond length is 2.36 Å. The Na(1)-O(3) bond length is 2.35 Å. The Na(1)-O(4) bond length is 2.35 Å. The Na(1)-O(7) bond length is 2.33 Å. The Na(1)-O(8) bond length is 2.33 Å. In the second Na site, Na(2) is bonded to one O(12), one O(13), one O(3), one O(5), one O(7), and one O(9) atom to form NaO6 octahedra that share corners with two equivalent Co(8)O6 octahedra, corners with four equivalent Co(2)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Co(10)O6 octahedra,  an edgeedge with one Co(11)O6 octahedra,  an edgeedge with one Co(12)O6 octahedra,  an edgeedge with one Co(5)O6 octahedra,  an edgeedge with one Co(6)O6 octahedra,  an edgeedge with one Co(7)O6 octahedra, edges with two equivalent Co(1)O6 octahedra, and edges with two equivalent Co(9)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-10°. The Na(2)-O(12) bond length is 2.35 Å. The Na(2)-O(13) bond length is 2.33 Å. The Na(2)-O(3) bond length is 2.33 Å. The Na(2)-O(5) bond length is 2.36 Å. The Na(2)-O(7) bond length is 2.35 Å. The Na(2)-O(9) bond length is 2.35 Å. In the third Na site, Na(3) is bonded to one O(10), one O(11), one O(14), one O(4), one O(6), and one O(8) atom to form NaO6 octahedra that share corners with two equivalent Co(9)O6 octahedra, corners with four equivalent Co(3)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Co(10)O6 octahedra,  an edgeedge with one Co(11)O6 octahedra,  an edgeedge with one Co(12)O6 octahedra,  an edgeedge with one Co(5)O6 octahedra,  an edgeedge with one Co(6)O6 octahedra,  an edgeedge with one Co(7)O6 octahedra, edges with two equivalent Co(4)O6 octahedra, and edges with two equivalent Co(8)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-10°. The Na(3)-O(10) bond length is 2.35 Å. The Na(3)-O(11) bond length is 2.36 Å. The Na(3)-O(14) bond length is 2.33 Å. The Na(3)-O(4) bond length is 2.33 Å. The Na(3)-O(6) bond length is 2.36 Å. The Na(3)-O(8) bond length is 2.35 Å. In the fourth Na site, Na(4) is bonded to one O(10), one O(13), one O(14), one O(15), one O(16), and one O(9) atom to form NaO6 octahedra that share corners with two equivalent Co(12)O6 octahedra, corners with four equivalent Co(7)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra,  an edgeedge with one Co(2)O6 octahedra,  an edgeedge with one Co(3)O6 octahedra,  an edgeedge with one Co(4)O6 octahedra,  an edgeedge with one Co(8)O6 octahedra,  an edgeedge with one Co(9)O6 octahedra, edges with two equivalent Co(11)O6 octahedra, and edges with two equivalent Co(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-10°. The Na(4)-O(10) bond length is 2.33 Å. The Na(4)-O(13) bond length is 2.35 Å. The Na(4)-O(14) bond length is 2.35 Å. The Na(4)-O(15) bond length is 2.35 Å. The Na(4)-O(16) bond length is 2.36 Å. The Na(4)-O(9) bond length is 2.33 Å. There are twelve inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(12), one O(13), one O(15), one O(3), and one O(5) atom to form CoO6 octahedra that share corners with two equivalent Co(3)O6 octahedra, corners with four equivalent Co(9)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Co(10)O6 octahedra,  an edgeedge with one Co(11)O6 octahedra,  an edgeedge with one Co(12)O6 octahedra,  an edgeedge with one Co(5)O6 octahedra,  an edgeedge with one Co(6)O6 octahedra,  an edgeedge with one Co(7)O6 octahedra, edges with two equivalent Na(2)O6 octahedra, and edges with two equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 10-13°. The Co(1)-O(1) bond length is 2.11 Å. The Co(1)-O(12) bond length is 2.14 Å. The Co(1)-O(13) bond length is 2.16 Å. The Co(1)-O(15) bond length is 2.11 Å. The Co(1)-O(3) bond length is 2.14 Å. The Co(1)-O(5) bond length is 2.15 Å. In the second Co site, Co(2) is bonded to one O(12), one O(13), one O(16), one O(2), one O(3), and one O(5) atom to form CoO6 octahedra that share corners with two equivalent Co(4)O6 octahedra, corners with four equivalent Na(2)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Co(10)O6 octahedra,  an edgeedge with one Co(11)O6 octahedra,  an edgeedge with one Co(12)O6 octahedra,  an edgeedge with one Co(5)O6 octahedra,  an edgeedge with one Co(6)O6 octahedra,  an edgeedge with one Co(7)O6 octahedra, edges with two equivalent Co(1)O6 octahedra, and edges with two equivalent Co(9)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-10°. The Co(2)-O(12) bond length is 1.96 Å. The Co(2)-O(13) bond length is 1.96 Å. The Co(2)-O(16) bond length is 2.23 Å. The Co(2)-O(2) bond length is 2.23 Å. The Co(2)-O(3) bond length is 1.95 Å. The Co(2)-O(5) bond length is 1.95 Å. In the third Co site, Co(3) is bonded to one O(1), one O(11), one O(14), one O(15), one O(4), and one O(6) atom to form CoO6 octahedra that share corners with two equivalent Co(1)O6 octahedra, corners with four equivalent Na(3)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Co(10)O6 octahedra,  an edgeedge with one Co(11)O6 octahedra,  an edgeedge with one Co(12)O6 octahedra,  an edgeedge with one Co(5)O6 octahedra,  an edgeedge with one Co(6)O6 octahedra,  an edgeedge with one Co(7)O6 octahedra, edges with two equivalent Co(4)O6 octahedra, and edges with two equivalent Co(8)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-10°. The Co(3)-O(1) bond length is 2.23 Å. The Co(3)-O(11) bond length is 1.96 Å. The Co(3)-O(14) bond length is 1.95 Å. The Co(3)-O(15) bond length is 2.23 Å. The Co(3)-O(4) bond length is 1.95 Å. The Co(3)-O(6) bond length is 1.96 Å. In the fourth Co site, Co(4) is bonded to one O(11), one O(14), one O(16), one O(2), one O(4), and one O(6) atom to form CoO6 octahedra that share corners with two equivalent Co(2)O6 octahedra, corners with four equivalent Co(8)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Co(10)O6 octahedra,  an edgeedge with one Co(11)O6 octahedra,  an edgeedge with one Co(12)O6 octahedra,  an edgeedge with one Co(5)O6 octahedra,  an edgeedge with one Co(6)O6 octahedra,  an edgeedge with one Co(7)O6 octahedra, edges with two equivalent Na(3)O6 octahedra, and edges with two equivalent Co(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 10-13°. The Co(4)-O(11) bond length is 2.14 Å. The Co(4)-O(14) bond length is 2.16 Å. The Co(4)-O(16) bond length is 2.11 Å. The Co(4)-O(2) bond length is 2.11 Å. The Co(4)-O(4) bond length is 2.13 Å. The Co(4)-O(6) bond length is 2.16 Å. In the fifth Co site, Co(5) is bonded to one O(10), one O(15), one O(16), one O(3), one O(4), and one O(9) atom to form CoO6 octahedra that share corners with two equivalent Na(1)O6 octahedra, corners with four equivalent Co(11)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra,  an edgeedge with one Co(2)O6 octahedra,  an edgeedge with one Co(3)O6 octahedra,  an edgeedge with one Co(4)O6 octahedra,  an edgeedge with one Co(8)O6 octahedra,  an edgeedge with one Co(9)O6 octahedra, edges with two equivalent Na(4)O6 octahedra, and edges with two equivalent Co(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 10-13°. The Co(5)-O(10) bond length is 2.20 Å. The Co(5)-O(15) bond length is 2.11 Å. The Co(5)-O(16) bond length is 2.13 Å. The Co(5)-O(3) bond length is 1.99 Å. The Co(5)-O(4) bond length is 2.00 Å. The Co(5)-O(9) bond length is 2.22 Å. In the sixth Co site, Co(6) is bonded to one O(1), one O(2), one O(5), one O(6), one O(7), and one O(8) atom to form CoO6 octahedra that share corners with two equivalent Co(7)O6 octahedra, corners with four equivalent Co(12)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra,  an edgeedge with one Co(2)O6 octahedra,  an edgeedge with one Co(3)O6 octahedra,  an edgeedge with one Co(4)O6 octahedra,  an edgeedge with one Co(8)O6 octahedra,  an edgeedge with one Co(9)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, and edges with two equivalent Co(10)O6 octahedra. The corner-sharing octahedral tilt angles range from 10-13°. The Co(6)-O(1) bond length is 2.17 Å. The Co(6)-O(2) bond length is 2.13 Å. The Co(6)-O(5) bond length is 2.11 Å. The Co(6)-O(6) bond length is 2.11 Å. The Co(6)-O(7) bond length is 2.13 Å. The Co(6)-O(8) bond length is 2.17 Å. In the seventh Co site, Co(7) is bonded to one O(10), one O(15), one O(16), one O(5), one O(6), and one O(9) atom to form CoO6 octahedra that share corners with two equivalent Co(6)O6 octahedra, corners with four equivalent Na(4)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra,  an edgeedge with one Co(2)O6 octahedra,  an edgeedge with one Co(3)O6 octahedra,  an edgeedge with one Co(4)O6 octahedra,  an edgeedge with one Co(8)O6 octahedra,  an edgeedge with one Co(9)O6 octahedra, edges with two equivalent Co(11)O6 octahedra, and edges with two equivalent Co(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-10°. The Co(7)-O(10) bond length is 1.95 Å. The Co(7)-O(15) bond length is 1.96 Å. The Co(7)-O(16) bond length is 1.96 Å. The Co(7)-O(5) bond length is 2.23 Å. The Co(7)-O(6) bond length is 2.22 Å. The Co(7)-O(9) bond length is 1.95 Å. In the eighth Co site, Co(8) is bonded to one O(11), one O(14), one O(4), one O(6), one O(7), and one O(9) atom to form CoO6 octahedra that share corners with two equivalent Na(2)O6 octahedra, corners with four equivalent Co(4)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Co(10)O6 octahedra,  an edgeedge with one Co(11)O6 octahedra,  an edgeedge with one Co(12)O6 octahedra,  an edgeedge with one Co(5)O6 octahedra,  an edgeedge with one Co(6)O6 octahedra,  an edgeedge with one Co(7)O6 octahedra, edges with two equivalent Na(3)O6 octahedra, and edges with two equivalent Co(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 10-13°. The Co(8)-O(11) bond length is 2.13 Å. The Co(8)-O(14) bond length is 2.20 Å. The Co(8)-O(4) bond length is 2.22 Å. The Co(8)-O(6) bond length is 2.11 Å. The Co(8)-O(7) bond length is 1.99 Å. The Co(8)-O(9) bond length is 1.99 Å. In the ninth Co site, Co(9) is bonded to one O(10), one O(12), one O(13), one O(3), one O(5), and one O(8) atom to form CoO6 octahedra that share corners with two equivalent Na(3)O6 octahedra, corners with four equivalent Co(1)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Co(10)O6 octahedra,  an edgeedge with one Co(11)O6 octahedra,  an edgeedge with one Co(12)O6 octahedra,  an edgeedge with one Co(5)O6 octahedra,  an edgeedge with one Co(6)O6 octahedra,  an edgeedge with one Co(7)O6 octahedra, edges with two equivalent Na(2)O6 octahedra, and edges with two equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 10-13°. The Co(9)-O(10) bond length is 1.99 Å. The Co(9)-O(12) bond length is 2.13 Å. The Co(9)-O(13) bond length is 2.20 Å. The Co(9)-O(3) bond length is 2.22 Å. The Co(9)-O(5) bond length is 2.12 Å. The Co(9)-O(8) bond length is 1.99 Å. In the tenth Co site, Co(10) is bonded to one O(1), one O(11), one O(12), one O(2), one O(7), and one O(8) atom to form CoO6 octahedra that share corners with two equivalent Co(11)O6 octahedra, corners with four equivalent Na(1)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra,  an edgeedge with one Co(2)O6 octahedra,  an edgeedge with one Co(3)O6 octahedra,  an edgeedge with one Co(4)O6 octahedra,  an edgeedge with one Co(8)O6 octahedra,  an edgeedge with one Co(9)O6 octahedra, edges with two equivalent Co(12)O6 octahedra, and edges with two equivalent Co(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-10°. The Co(10)-O(1) bond length is 1.95 Å. The Co(10)-O(11) bond length is 2.23 Å. The Co(10)-O(12) bond length is 2.23 Å. The Co(10)-O(2) bond length is 1.95 Å. The Co(10)-O(7) bond length is 1.96 Å. The Co(10)-O(8) bond length is 1.96 Å. In the eleventh Co site, Co(11) is bonded to one O(10), one O(11), one O(12), one O(15), one O(16), and one O(9) atom to form CoO6 octahedra that share corners with two equivalent Co(10)O6 octahedra, corners with four equivalent Co(5)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra,  an edgeedge with one Co(2)O6 octahedra,  an edgeedge with one Co(3)O6 octahedra,  an edgeedge with one Co(4)O6 octahedra,  an edgeedge with one Co(8)O6 octahedra,  an edgeedge with one Co(9)O6 octahedra, edges with two equivalent Na(4)O6 octahedra, and edges with two equivalent Co(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 10-13°. The Co(11)-O(10) bond length is 2.16 Å. The Co(11)-O(11) bond length is 2.11 Å. The Co(11)-O(12) bond length is 2.11 Å. The Co(11)-O(15) bond length is 2.16 Å. The Co(11)-O(16) bond length is 2.14 Å. The Co(11)-O(9) bond length is 2.14 Å. In the twelfth Co site, Co(12) is bonded to one O(1), one O(13), one O(14), one O(2), one O(7), and one O(8) atom to form CoO6 octahedra that share corners with two equivalent Na(4)O6 octahedra, corners with four equivalent Co(6)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra,  an edgeedge with one Co(2)O6 octahedra,  an edgeedge with one Co(3)O6 octahedra,  an edgeedge with one Co(4)O6 octahedra,  an edgeedge with one Co(8)O6 octahedra,  an edgeedge with one Co(9)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, and edges with two equivalent Co(10)O6 octahedra. The corner-sharing octahedral tilt angles range from 10-13°. The Co(12)-O(1) bond length is 2.11 Å. The Co(12)-O(13) bond length is 1.99 Å. The Co(12)-O(14) bond length is 2.00 Å. The Co(12)-O(2) bond length is 2.14 Å. The Co(12)-O(7) bond length is 2.23 Å. The Co(12)-O(8) bond length is 2.19 Å. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), one Co(1), one Co(10), one Co(12), one Co(3), and one Co(6) atom to form ONaCo5 octahedra that share corners with two equivalent O(15)NaCo5 octahedra, corners with four equivalent O(8)Na2Co4 octahedra,  an edgeedge with one O(13)Na2Co4 octahedra,  an edgeedge with one O(14)Na2Co4 octahedra,  an edgeedge with one O(3)Na2Co4 octahedra,  an edgeedge with one O(4)Na2Co4 octahedra,  an edgeedge with one O(11)NaCo5 octahedra,  an edgeedge with one O(12)NaCo5 octahedra,  an edgeedge with one O(5)NaCo5 octahedra,  an edgeedge with one O(6)NaCo5 octahedra, edges with two equivalent O(7)Na2Co4 octahedra, and edges with two equivalent O(2)NaCo5 octahedra. The corner-sharing octahedral tilt angles range from 6-8°. In the second O site, O(2) is bonded to one Na(1), one Co(10), one Co(12), one Co(2), one Co(4), and one Co(6) atom to form ONaCo5 octahedra that share corners with two equivalent O(16)NaCo5 octahedra, corners with four equivalent O(7)Na2Co4 octahedra,  an edgeedge with one O(13)Na2Co4 octahedra,  an edgeedge with one O(14)Na2Co4 octahedra,  an edgeedge with one O(3)Na2Co4 octahedra,  an edgeedge with one O(4)Na2Co4 octahedra,  an edgeedge with one O(11)NaCo5 octahedra,  an edgeedge with one O(12)NaCo5 octahedra,  an edgeedge with one O(5)NaCo5 octahedra,  an edgeedge with one O(6)NaCo5 octahedra, edges with two equivalent O(8)Na2Co4 octahedra, and edges with two equivalent O(1)NaCo5 octahedra. The corner-sharing octahedral tilt angles range from 6-9°. In the third O site, O(3) is bonded to one Na(1), one Na(2), one Co(1), one Co(2), one Co(5), and one Co(9) atom to form ONa2Co4 octahedra that share corners with two equivalent O(4)Na2Co4 octahedra, corners with four equivalent O(12)NaCo5 octahedra,  an edgeedge with one O(10)Na2Co4 octahedra,  an edgeedge with one O(7)Na2Co4 octahedra,  an edgeedge with one O(8)Na2Co4 octahedra,  an edgeedge with one O(9)Na2Co4 octahedra,  an edgeedge with one O(1)NaCo5 octahedra,  an edgeedge with one O(15)NaCo5 octahedra,  an edgeedge with one O(16)NaCo5 octahedra,  an edgeedge with one O(2)NaCo5 octahedra, edges with two equivalent O(13)Na2Co4 octahedra, and edges with two equivalent O(5)NaCo5 octahedra. The corner-sharing octahedral tilt angles range from 5-9°. In the fourth O site, O(4) is bonded to one Na(1), one Na(3), one Co(3), one Co(4), one Co(5), and one Co(8) atom to form ONa2Co4 octahedra that share corners with two equivalent O(3)Na2Co4 octahedra, corners with four equivalent O(11)NaCo5 octahedra,  an edgeedge with one O(10)Na2Co4 octahedra,  an edgeedge with one O(7)Na2Co4 octahedra,  an edgeedge with one O(8)Na2Co4 octahedra,  an edgeedge with one O(9)Na2Co4 octahedra,  an edgeedge with one O(1)NaCo5 octahedra,  an edgeedge with one O(15)NaCo5 octahedra,  an edgeedge with one O(16)NaCo5 octahedra,  an edgeedge with one O(2)NaCo5 octahedra, edges with two equivalent O(14)Na2Co4 octahedra, and edges with two equivalent O(6)NaCo5 octahedra. The corner-sharing octahedral tilt angles range from 5-9°. In the fifth O site, O(5) is bonded to one Na(2), one Co(1), one Co(2), one Co(6), one Co(7), and one Co(9) atom to form ONaCo5 octahedra that share corners with two equivalent O(6)NaCo5 octahedra, corners with four equivalent O(13)Na2Co4 octahedra,  an edgeedge with one O(10)Na2Co4 octahedra,  an edgeedge with one O(7)Na2Co4 octahedra,  an edgeedge with one O(8)Na2Co4 octahedra,  an edgeedge with one O(9)Na2Co4 octahedra,  an edgeedge with one O(1)NaCo5 octahedra,  an edgeedge with one O(15)NaCo5 octahedra,  an edgeedge with one O(16)NaCo5 octahedra,  an edgeedge with one O(2)NaCo5 octahedra, edges with two equivalent O(3)Na2Co4 octahedra, and edges with two equivalent O(12)NaCo5 octahedra. The corner-sharing octahedral tilt angles range from 6-8°. In the sixth O site, O(6) is bonded to one Na(3), one Co(3), one Co(4), one Co(6), one Co(7), and one Co(8) atom to form ONaCo5 octahedra that share corners with two equivalent O(5)NaCo5 octahedra, corners with four equivalent O(14)Na2Co4 octahedra,  an edgeedge with one O(10)Na2Co4 octahedra,  an edgeedge with one O(7)Na2Co4 octahedra,  an edgeedge with one O(8)Na2Co4 octahedra,  an edgeedge with one O(9)Na2Co4 octahedra,  an edgeedge with one O(1)NaCo5 octahedra,  an edgeedge with one O(15)NaCo5 octahedra,  an edgeedge with one O(16)NaCo5 octahedra,  an edgeedge with one O(2)NaCo5 octahedra, edges with two equivalent O(4)Na2Co4 octahedra, and edges with two equivalent O(11)NaCo5 octahedra. The corner-sharing octahedral tilt angles range from 6-8°. In the seventh O site, O(7) is bonded to one Na(1), one Na(2), one Co(10), one Co(12), one Co(6), and one Co(8) atom to form ONa2Co4 octahedra that share corners with two equivalent O(9)Na2Co4 octahedra, corners with four equivalent O(2)NaCo5 octahedra,  an edgeedge with one O(13)Na2Co4 octahedra,  an edgeedge with one O(14)Na2Co4 octahedra,  an edgeedge with one O(3)Na2Co4 octahedra,  an edgeedge with one O(4)Na2Co4 octahedra,  an edgeedge with one O(11)NaCo5 octahedra,  an edgeedge with one O(12)NaCo5 octahedra,  an edgeedge with one O(5)NaCo5 octahedra,  an edgeedge with one O(6)NaCo5 octahedra, edges with two equivalent O(8)Na2Co4 octahedra, and edges with two equivalent O(1)NaCo5 octahedra. The corner-sharing octahedral tilt angles range from 5-9°. In the eighth O site, O(8) is bonded to one Na(1), one Na(3), one Co(10), one Co(12), one Co(6), and one Co(9) atom to form ONa2Co4 octahedra that share corners with two equivalent O(10)Na2Co4 octahedra, corners with four equivalent O(1)NaCo5 octahedra,  an edgeedge with one O(13)Na2Co4 octahedra,  an edgeedge with one O(14)Na2Co4 octahedra,  an edgeedge with one O(3)Na2Co4 octahedra,  an edgeedge with one O(4)Na2Co4 octahedra,  an edgeedge with one O(11)NaCo5 octahedra,  an edgeedge with one O(12)NaCo5 octahedra,  an edgeedge with one O(5)NaCo5 octahedra,  an edgeedge with one O(6)NaCo5 octahedra, edges with two equivalent O(7)Na2Co4 octahedra, and edges with two equivalent O(2)NaCo5 octahedra. The corner-sharing octahedral tilt angles range from 4-8°. In the ninth O site, O(9) is bonded to one Na(2), one Na(4), one Co(11), one Co(5), one Co(7), and one Co(8) atom to form ONa2Co4 octahedra that share corners with two equivalent O(7)Na2Co4 octahedra, corners with four equivalent O(16)NaCo5 octahedra,  an edgeedge with one O(13)Na2Co4 octahedra,  an edgeedge with one O(14)Na2Co4 octahedra,  an edgeedge with one O(3)Na2Co4 octahedra,  an edgeedge with one O(4)Na2Co4 octahedra,  an edgeedge with one O(11)NaCo5 octahedra,  an edgeedge with one O(12)NaCo5 octahedra,  an edgeedge with one O(5)NaCo5 octahedra,  an edgeedge with one O(6)NaCo5 octahedra, edges with two equivalent O(10)Na2Co4 octahedra, and edges with two equivalent O(15)NaCo5 octahedra. The corner-sharing octahedral tilt angles range from 5-9°. In the tenth O site, O(10) is bonded to one Na(3), one Na(4), one Co(11), one Co(5), one Co(7), and one Co(9) atom to form ONa2Co4 octahedra that share corners with two equivalent O(8)Na2Co4 octahedra, corners with four equivalent O(15)NaCo5 octahedra,  an edgeedge with one O(13)Na2Co4 octahedra,  an edgeedge with one O(14)Na2Co4 octahedra,  an edgeedge with one O(3)Na2Co4 octahedra,  an edgeedge with one O(4)Na2Co4 octahedra,  an edgeedge with one O(11)NaCo5 octahedra,  an edgeedge with one O(12)NaCo5 octahedra,  an edgeedge with one O(5)NaCo5 octahedra,  an edgeedge with one O(6)NaCo5 octahedra, edges with two equivalent O(9)Na2Co4 octahedra, and edges with two equivalent O(16)NaCo5 octahedra. The corner-sharing octahedral tilt angles range from 4-8°. In the eleventh O site, O(11) is bonded to one Na(3), one Co(10), one Co(11), one Co(3), one Co(4), and one Co(8) atom to form ONaCo5 octahedra that share corners with two equivalent O(12)NaCo5 octahedra, corners with four equivalent O(4)Na2Co4 octahedra,  an edgeedge with one O(10)Na2Co4 octahedra,  an edgeedge with one O(7)Na2Co4 octahedra,  an edgeedge with one O(8)Na2Co4 octahedra,  an edgeedge with one O(9)Na2Co4 octahedra,  an edgeedge with one O(1)NaCo5 octahedra,  an edgeedge with one O(15)NaCo5 octahedra,  an edgeedge with one O(16)NaCo5 octahedra,  an edgeedge with one O(2)NaCo5 octahedra, edges with two equivalent O(14)Na2Co4 octahedra, and edges with two equivalent O(6)NaCo5 octahedra. The corner-sharing octahedral tilt angles range from 6-9°. In the twelfth O site, O(12) is bonded to one Na(2), one Co(1), one Co(10), one Co(11), one Co(2), and one Co(9) atom to form ONaCo5 octahedra that share corners with two equivalent O(11)NaCo5 octahedra, corners with four equivalent O(3)Na2Co4 octahedra,  an edgeedge with one O(10)Na2Co4 octahedra,  an edgeedge with one O(7)Na2Co4 octahedra,  an edgeedge with one O(8)Na2Co4 octahedra,  an edgeedge with one O(9)Na2Co4 octahedra,  an edgeedge with one O(1)NaCo5 octahedra,  an edgeedge with one O(15)NaCo5 octahedra,  an edgeedge with one O(16)NaCo5 octahedra,  an edgeedge with one O(2)NaCo5 octahedra, edges with two equivalent O(13)Na2Co4 octahedra, and edges with two equivalent O(5)NaCo5 octahedra. The corner-sharing octahedral tilt angles range from 6-9°. In the thirteenth O site, O(13) is bonded to one Na(2), one Na(4), one Co(1), one Co(12), one Co(2), and one Co(9) atom to form ONa2Co4 octahedra that share corners with two equivalent O(14)Na2Co4 octahedra, corners with four equivalent O(5)NaCo5 octahedra,  an edgeedge with one O(10)Na2Co4 octahedra,  an edgeedge with one O(7)Na2Co4 octahedra,  an edgeedge with one O(8)Na2Co4 octahedra,  an edgeedge with one O(9)Na2Co4 octahedra,  an edgeedge with one O(1)NaCo5 octahedra,  an edgeedge with one O(15)NaCo5 octahedra,  an edgeedge with one O(16)NaCo5 octahedra,  an edgeedge with one O(2)NaCo5 octahedra, edges with two equivalent O(3)Na2Co4 octahedra, and edges with two equivalent O(12)NaCo5 octahedra. The corner-sharing octahedral tilt angles range from 4-9°. In the fourteenth O site, O(14) is bonded to one Na(3), one Na(4), one Co(12), one Co(3), one Co(4), and one Co(8) atom to form ONa2Co4 octahedra that share corners with two equivalent O(13)Na2Co4 octahedra, corners with four equivalent O(6)NaCo5 octahedra,  an edgeedge with one O(10)Na2Co4 octahedra,  an edgeedge with one O(7)Na2Co4 octahedra,  an edgeedge with one O(8)Na2Co4 octahedra,  an edgeedge with one O(9)Na2Co4 octahedra,  an edgeedge with one O(1)NaCo5 octahedra,  an edgeedge with one O(15)NaCo5 octahedra,  an edgeedge with one O(16)NaCo5 octahedra,  an edgeedge with one O(2)NaCo5 octahedra, edges with two equivalent O(4)Na2Co4 octahedra, and edges with two equivalent O(11)NaCo5 octahedra. The corner-sharing octahedral tilt angles range from 4-9°. In the fifteenth O site, O(15) is bonded to one Na(4), one Co(1), one Co(11), one Co(3), one Co(5), and one Co(7) atom to form ONaCo5 octahedra that share corners with two equivalent O(1)NaCo5 octahedra, corners with four equivalent O(10)Na2Co4 octahedra,  an edgeedge with one O(13)Na2Co4 octahedra,  an edgeedge with one O(14)Na2Co4 octahedra,  an edgeedge with one O(3)Na2Co4 octahedra,  an edgeedge with one O(4)Na2Co4 octahedra,  an edgeedge with one O(11)NaCo5 octahedra,  an edgeedge with one O(12)NaCo5 octahedra,  an edgeedge with one O(5)NaCo5 octahedra,  an edgeedge with one O(6)NaCo5 octahedra, edges with two equivalent O(9)Na2Co4 octahedra, and edges with two equivalent O(16)NaCo5 octahedra. The corner-sharing octahedral tilt angles range from 6-8°. In the sixteenth O site, O(16) is bonded to one Na(4), one Co(11), one Co(2), one Co(4), one Co(5), and one Co(7) atom to form ONaCo5 octahedra that share corners with two equivalent O(2)NaCo5 octahedra, corners with four equivalent O(9)Na2Co4 octahedra,  an edgeedge with one O(13)Na2Co4 octahedra,  an edgeedge with one O(14)Na2Co4 octahedra,  an edgeedge with one O(3)Na2Co4 octahedra,  an edgeedge with one O(4)Na2Co4 octahedra,  an edgeedge with one O(11)NaCo5 octahedra,  an edgeedge with one O(12)NaCo5 octahedra,  an edgeedge with one O(5)NaCo5 octahedra,  an edgeedge with one O(6)NaCo5 octahedra, edges with two equivalent O(10)Na2Co4 octahedra, and edges with two equivalent O(15)NaCo5 octahedra. The corner-sharing octahedral tilt angles range from 6-9°.