Na6MnNi3(SbO6)2 is Caswellsilverite-derived structured and crystallizes in the monoclinic P2 space group. There are six inequivalent Na sites. In the first Na site, Na(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form NaO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Ni(3)O6 octahedra, corners with two equivalent Sb(1)O6 octahedra,  an edgeedge with one Na(5)O6 octahedra,  an edgeedge with one Na(6)O6 octahedra, edges with two equivalent Na(2)O6 octahedra, edges with two equivalent Na(3)O6 octahedra, edges with two equivalent Ni(1)O6 octahedra, edges with two equivalent Ni(2)O6 octahedra, and edges with two equivalent Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 8-13°. In the second Na site, Na(2) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form NaO6 octahedra that share corners with two equivalent Ni(1)O6 octahedra, corners with two equivalent Ni(2)O6 octahedra, corners with two equivalent Sb(2)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, edges with two equivalent Na(6)O6 octahedra, edges with two equivalent Ni(2)O6 octahedra, edges with two equivalent Ni(3)O6 octahedra, and edges with two equivalent Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 9-13°. In the third Na site, Na(3) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(6) atoms to form NaO6 octahedra that share corners with two equivalent Ni(1)O6 octahedra, corners with two equivalent Ni(2)O6 octahedra, corners with two equivalent Sb(2)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, edges with two equivalent Na(5)O6 octahedra, edges with two equivalent Mn(1)O6 octahedra, edges with two equivalent Ni(1)O6 octahedra, and edges with two equivalent Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 7-13°. In the fourth Na site, Na(4) is bonded to two equivalent O(4), two equivalent O(5), and two equivalent O(6) atoms to form NaO6 octahedra that share corners with two equivalent Ni(1)O6 octahedra, corners with two equivalent Ni(2)O6 octahedra, corners with two equivalent Sb(2)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra, edges with two equivalent Na(5)O6 octahedra, edges with two equivalent Na(6)O6 octahedra, edges with two equivalent Mn(1)O6 octahedra, edges with two equivalent Ni(3)O6 octahedra, and edges with two equivalent Sb(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 6-12°. In the fifth Na site, Na(5) is bonded to two equivalent O(1), two equivalent O(5), and two equivalent O(6) atoms to form NaO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Ni(3)O6 octahedra, corners with two equivalent Sb(1)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(6)O6 octahedra, edges with two equivalent Na(3)O6 octahedra, edges with two equivalent Na(4)O6 octahedra, edges with two equivalent Mn(1)O6 octahedra, edges with two equivalent Ni(1)O6 octahedra, and edges with two equivalent Sb(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 7-14°. In the sixth Na site, Na(6) is bonded to two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms to form NaO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Ni(3)O6 octahedra, corners with two equivalent Sb(1)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(5)O6 octahedra, edges with two equivalent Na(2)O6 octahedra, edges with two equivalent Na(4)O6 octahedra, edges with two equivalent Ni(2)O6 octahedra, edges with two equivalent Ni(3)O6 octahedra, and edges with two equivalent Sb(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 9-13°. Mn(1) is bonded to two equivalent O(1), two equivalent O(5), and two equivalent O(6) atoms to form MnO6 octahedra that share corners with two equivalent Na(1)O6 octahedra, corners with two equivalent Na(5)O6 octahedra, corners with two equivalent Na(6)O6 octahedra,  an edgeedge with one Ni(3)O6 octahedra,  an edgeedge with one Sb(1)O6 octahedra, edges with two equivalent Na(3)O6 octahedra, edges with two equivalent Na(4)O6 octahedra, edges with two equivalent Na(5)O6 octahedra, edges with two equivalent Ni(1)O6 octahedra, and edges with two equivalent Sb(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 12-14°. There are three inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(6) atoms to form NiO6 octahedra that share corners with two equivalent Na(2)O6 octahedra, corners with two equivalent Na(3)O6 octahedra, corners with two equivalent Na(4)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra,  an edgeedge with one Sb(2)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, edges with two equivalent Na(3)O6 octahedra, edges with two equivalent Na(5)O6 octahedra, edges with two equivalent Mn(1)O6 octahedra, and edges with two equivalent Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 12-13°. In the second Ni site, Ni(2) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form NiO6 octahedra that share corners with two equivalent Na(2)O6 octahedra, corners with two equivalent Na(3)O6 octahedra, corners with two equivalent Na(4)O6 octahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Sb(2)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, edges with two equivalent Na(2)O6 octahedra, edges with two equivalent Na(6)O6 octahedra, edges with two equivalent Ni(3)O6 octahedra, and edges with two equivalent Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 12-13°. In the third Ni site, Ni(3) is bonded to two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms to form NiO6 octahedra that share corners with two equivalent Na(1)O6 octahedra, corners with two equivalent Na(5)O6 octahedra, corners with two equivalent Na(6)O6 octahedra,  an edgeedge with one Mn(1)O6 octahedra,  an edgeedge with one Sb(1)O6 octahedra, edges with two equivalent Na(2)O6 octahedra, edges with two equivalent Na(4)O6 octahedra, edges with two equivalent Na(6)O6 octahedra, edges with two equivalent Ni(2)O6 octahedra, and edges with two equivalent Sb(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 11-13°. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form SbO6 octahedra that share corners with two equivalent Na(1)O6 octahedra, corners with two equivalent Na(5)O6 octahedra, corners with two equivalent Na(6)O6 octahedra,  an edgeedge with one Mn(1)O6 octahedra,  an edgeedge with one Ni(3)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, edges with two equivalent Na(2)O6 octahedra, edges with two equivalent Na(3)O6 octahedra, edges with two equivalent Ni(1)O6 octahedra, and edges with two equivalent Ni(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 7-9°. In the second Sb site, Sb(2) is bonded to two equivalent O(4), two equivalent O(5), and two equivalent O(6) atoms to form SbO6 octahedra that share corners with two equivalent Na(2)O6 octahedra, corners with two equivalent Na(3)O6 octahedra, corners with two equivalent Na(4)O6 octahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra, edges with two equivalent Na(4)O6 octahedra, edges with two equivalent Na(5)O6 octahedra, edges with two equivalent Na(6)O6 octahedra, edges with two equivalent Mn(1)O6 octahedra, and edges with two equivalent Ni(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 6-9°. There are six inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), one Na(3), one Na(5), one Mn(1), one Ni(1), and one Sb(1) atom to form ONa3MnNiSb octahedra that share corners with two equivalent O(1)Na3MnNiSb octahedra, corners with two equivalent O(5)Na3MnNiSb octahedra, corners with two equivalent O(3)Na3Ni2Sb octahedra,  an edgeedge with one O(5)Na3MnNiSb octahedra,  an edgeedge with one O(3)Na3Ni2Sb octahedra, edges with two equivalent O(1)Na3MnNiSb octahedra, edges with four equivalent O(6)Na3MnNiSb octahedra, and edges with four equivalent O(2)Na3Ni2Sb octahedra. The corner-sharing octahedral tilt angles range from 0-9°. In the second O site, O(2) is bonded to one Na(1), one Na(2), one Na(3), one Ni(1), one Ni(2), and one Sb(1) atom to form ONa3Ni2Sb octahedra that share corners with two equivalent O(6)Na3MnNiSb octahedra, corners with two equivalent O(2)Na3Ni2Sb octahedra, corners with two equivalent O(4)Na3Ni2Sb octahedra,  an edgeedge with one O(6)Na3MnNiSb octahedra,  an edgeedge with one O(4)Na3Ni2Sb octahedra, edges with two equivalent O(2)Na3Ni2Sb octahedra, edges with four equivalent O(1)Na3MnNiSb octahedra, and edges with four equivalent O(3)Na3Ni2Sb octahedra. The corner-sharing octahedral tilt angles range from 1-6°. In the third O site, O(3) is bonded to one Na(1), one Na(2), one Na(6), one Ni(2), one Ni(3), and one Sb(1) atom to form ONa3Ni2Sb octahedra that share corners with two equivalent O(1)Na3MnNiSb octahedra, corners with two equivalent O(5)Na3MnNiSb octahedra, corners with two equivalent O(3)Na3Ni2Sb octahedra,  an edgeedge with one O(1)Na3MnNiSb octahedra,  an edgeedge with one O(5)Na3MnNiSb octahedra, edges with two equivalent O(3)Na3Ni2Sb octahedra, edges with four equivalent O(2)Na3Ni2Sb octahedra, and edges with four equivalent O(4)Na3Ni2Sb octahedra. The corner-sharing octahedral tilt angles range from 0-6°. In the fourth O site, O(4) is bonded to one Na(2), one Na(4), one Na(6), one Ni(2), one Ni(3), and one Sb(2) atom to form ONa3Ni2Sb octahedra that share corners with two equivalent O(6)Na3MnNiSb octahedra, corners with two equivalent O(2)Na3Ni2Sb octahedra, corners with two equivalent O(4)Na3Ni2Sb octahedra,  an edgeedge with one O(6)Na3MnNiSb octahedra,  an edgeedge with one O(2)Na3Ni2Sb octahedra, edges with two equivalent O(4)Na3Ni2Sb octahedra, edges with four equivalent O(5)Na3MnNiSb octahedra, and edges with four equivalent O(3)Na3Ni2Sb octahedra. The corner-sharing octahedral tilt angles range from 2-7°. In the fifth O site, O(5) is bonded to one Na(4), one Na(5), one Na(6), one Mn(1), one Ni(3), and one Sb(2) atom to form ONa3MnNiSb octahedra that share corners with two equivalent O(1)Na3MnNiSb octahedra, corners with two equivalent O(5)Na3MnNiSb octahedra, corners with two equivalent O(3)Na3Ni2Sb octahedra,  an edgeedge with one O(1)Na3MnNiSb octahedra,  an edgeedge with one O(3)Na3Ni2Sb octahedra, edges with two equivalent O(5)Na3MnNiSb octahedra, edges with four equivalent O(6)Na3MnNiSb octahedra, and edges with four equivalent O(4)Na3Ni2Sb octahedra. The corner-sharing octahedral tilt angles range from 1-5°. In the sixth O site, O(6) is bonded to one Na(3), one Na(4), one Na(5), one Mn(1), one Ni(1), and one Sb(2) atom to form ONa3MnNiSb octahedra that share corners with two equivalent O(6)Na3MnNiSb octahedra, corners with two equivalent O(2)Na3Ni2Sb octahedra, corners with two equivalent O(4)Na3Ni2Sb octahedra,  an edgeedge with one O(2)Na3Ni2Sb octahedra,  an edgeedge with one O(4)Na3Ni2Sb octahedra, edges with two equivalent O(6)Na3MnNiSb octahedra, edges with four equivalent O(1)Na3MnNiSb octahedra, and edges with four equivalent O(5)Na3MnNiSb octahedra. The corner-sharing octahedral tilt angles range from 2-8°.
Na6MnNi3(SbO6)2 is Caswellsilverite-derived structured and crystallizes in the monoclinic P2 space group. There are six inequivalent Na sites. In the first Na site, Na(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form NaO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Ni(3)O6 octahedra, corners with two equivalent Sb(1)O6 octahedra,  an edgeedge with one Na(5)O6 octahedra,  an edgeedge with one Na(6)O6 octahedra, edges with two equivalent Na(2)O6 octahedra, edges with two equivalent Na(3)O6 octahedra, edges with two equivalent Ni(1)O6 octahedra, edges with two equivalent Ni(2)O6 octahedra, and edges with two equivalent Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 8-13°. Both Na(1)-O(1) bond lengths are 2.34 Å. Both Na(1)-O(2) bond lengths are 2.49 Å. Both Na(1)-O(3) bond lengths are 2.39 Å. In the second Na site, Na(2) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form NaO6 octahedra that share corners with two equivalent Ni(1)O6 octahedra, corners with two equivalent Ni(2)O6 octahedra, corners with two equivalent Sb(2)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, edges with two equivalent Na(6)O6 octahedra, edges with two equivalent Ni(2)O6 octahedra, edges with two equivalent Ni(3)O6 octahedra, and edges with two equivalent Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 9-13°. Both Na(2)-O(2) bond lengths are 2.44 Å. Both Na(2)-O(3) bond lengths are 2.39 Å. Both Na(2)-O(4) bond lengths are 2.43 Å. In the third Na site, Na(3) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(6) atoms to form NaO6 octahedra that share corners with two equivalent Ni(1)O6 octahedra, corners with two equivalent Ni(2)O6 octahedra, corners with two equivalent Sb(2)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, edges with two equivalent Na(5)O6 octahedra, edges with two equivalent Mn(1)O6 octahedra, edges with two equivalent Ni(1)O6 octahedra, and edges with two equivalent Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 7-13°. Both Na(3)-O(1) bond lengths are 2.39 Å. Both Na(3)-O(2) bond lengths are 2.43 Å. Both Na(3)-O(6) bond lengths are 2.46 Å. In the fourth Na site, Na(4) is bonded to two equivalent O(4), two equivalent O(5), and two equivalent O(6) atoms to form NaO6 octahedra that share corners with two equivalent Ni(1)O6 octahedra, corners with two equivalent Ni(2)O6 octahedra, corners with two equivalent Sb(2)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra, edges with two equivalent Na(5)O6 octahedra, edges with two equivalent Na(6)O6 octahedra, edges with two equivalent Mn(1)O6 octahedra, edges with two equivalent Ni(3)O6 octahedra, and edges with two equivalent Sb(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 6-12°. Both Na(4)-O(4) bond lengths are 2.38 Å. Both Na(4)-O(5) bond lengths are 2.49 Å. Both Na(4)-O(6) bond lengths are 2.40 Å. In the fifth Na site, Na(5) is bonded to two equivalent O(1), two equivalent O(5), and two equivalent O(6) atoms to form NaO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Ni(3)O6 octahedra, corners with two equivalent Sb(1)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(6)O6 octahedra, edges with two equivalent Na(3)O6 octahedra, edges with two equivalent Na(4)O6 octahedra, edges with two equivalent Mn(1)O6 octahedra, edges with two equivalent Ni(1)O6 octahedra, and edges with two equivalent Sb(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 7-14°. Both Na(5)-O(1) bond lengths are 2.45 Å. Both Na(5)-O(5) bond lengths are 2.45 Å. Both Na(5)-O(6) bond lengths are 2.33 Å. In the sixth Na site, Na(6) is bonded to two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms to form NaO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Ni(3)O6 octahedra, corners with two equivalent Sb(1)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(5)O6 octahedra, edges with two equivalent Na(2)O6 octahedra, edges with two equivalent Na(4)O6 octahedra, edges with two equivalent Ni(2)O6 octahedra, edges with two equivalent Ni(3)O6 octahedra, and edges with two equivalent Sb(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 9-13°. Both Na(6)-O(3) bond lengths are 2.43 Å. Both Na(6)-O(4) bond lengths are 2.40 Å. Both Na(6)-O(5) bond lengths are 2.38 Å. Mn(1) is bonded to two equivalent O(1), two equivalent O(5), and two equivalent O(6) atoms to form MnO6 octahedra that share corners with two equivalent Na(1)O6 octahedra, corners with two equivalent Na(5)O6 octahedra, corners with two equivalent Na(6)O6 octahedra,  an edgeedge with one Ni(3)O6 octahedra,  an edgeedge with one Sb(1)O6 octahedra, edges with two equivalent Na(3)O6 octahedra, edges with two equivalent Na(4)O6 octahedra, edges with two equivalent Na(5)O6 octahedra, edges with two equivalent Ni(1)O6 octahedra, and edges with two equivalent Sb(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 12-14°. Both Mn(1)-O(1) bond lengths are 2.22 Å. Both Mn(1)-O(5) bond lengths are 2.21 Å. Both Mn(1)-O(6) bond lengths are 2.22 Å. There are three inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(6) atoms to form NiO6 octahedra that share corners with two equivalent Na(2)O6 octahedra, corners with two equivalent Na(3)O6 octahedra, corners with two equivalent Na(4)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra,  an edgeedge with one Sb(2)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, edges with two equivalent Na(3)O6 octahedra, edges with two equivalent Na(5)O6 octahedra, edges with two equivalent Mn(1)O6 octahedra, and edges with two equivalent Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 12-13°. Both Ni(1)-O(1) bond lengths are 2.16 Å. Both Ni(1)-O(2) bond lengths are 2.14 Å. Both Ni(1)-O(6) bond lengths are 2.17 Å. In the second Ni site, Ni(2) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form NiO6 octahedra that share corners with two equivalent Na(2)O6 octahedra, corners with two equivalent Na(3)O6 octahedra, corners with two equivalent Na(4)O6 octahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Sb(2)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, edges with two equivalent Na(2)O6 octahedra, edges with two equivalent Na(6)O6 octahedra, edges with two equivalent Ni(3)O6 octahedra, and edges with two equivalent Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 12-13°. Both Ni(2)-O(2) bond lengths are 2.14 Å. Both Ni(2)-O(3) bond lengths are 2.15 Å. Both Ni(2)-O(4) bond lengths are 2.15 Å. In the third Ni site, Ni(3) is bonded to two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms to form NiO6 octahedra that share corners with two equivalent Na(1)O6 octahedra, corners with two equivalent Na(5)O6 octahedra, corners with two equivalent Na(6)O6 octahedra,  an edgeedge with one Mn(1)O6 octahedra,  an edgeedge with one Sb(1)O6 octahedra, edges with two equivalent Na(2)O6 octahedra, edges with two equivalent Na(4)O6 octahedra, edges with two equivalent Na(6)O6 octahedra, edges with two equivalent Ni(2)O6 octahedra, and edges with two equivalent Sb(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 11-13°. Both Ni(3)-O(3) bond lengths are 2.13 Å. Both Ni(3)-O(4) bond lengths are 2.14 Å. Both Ni(3)-O(5) bond lengths are 2.15 Å. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form SbO6 octahedra that share corners with two equivalent Na(1)O6 octahedra, corners with two equivalent Na(5)O6 octahedra, corners with two equivalent Na(6)O6 octahedra,  an edgeedge with one Mn(1)O6 octahedra,  an edgeedge with one Ni(3)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, edges with two equivalent Na(2)O6 octahedra, edges with two equivalent Na(3)O6 octahedra, edges with two equivalent Ni(1)O6 octahedra, and edges with two equivalent Ni(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 7-9°. Both Sb(1)-O(1) bond lengths are 2.04 Å. Both Sb(1)-O(2) bond lengths are 2.03 Å. Both Sb(1)-O(3) bond lengths are 2.03 Å. In the second Sb site, Sb(2) is bonded to two equivalent O(4), two equivalent O(5), and two equivalent O(6) atoms to form SbO6 octahedra that share corners with two equivalent Na(2)O6 octahedra, corners with two equivalent Na(3)O6 octahedra, corners with two equivalent Na(4)O6 octahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra, edges with two equivalent Na(4)O6 octahedra, edges with two equivalent Na(5)O6 octahedra, edges with two equivalent Na(6)O6 octahedra, edges with two equivalent Mn(1)O6 octahedra, and edges with two equivalent Ni(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 6-9°. Both Sb(2)-O(4) bond lengths are 2.03 Å. Both Sb(2)-O(5) bond lengths are 2.03 Å. Both Sb(2)-O(6) bond lengths are 2.05 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), one Na(3), one Na(5), one Mn(1), one Ni(1), and one Sb(1) atom to form ONa3MnNiSb octahedra that share corners with two equivalent O(1)Na3MnNiSb octahedra, corners with two equivalent O(5)Na3MnNiSb octahedra, corners with two equivalent O(3)Na3Ni2Sb octahedra,  an edgeedge with one O(5)Na3MnNiSb octahedra,  an edgeedge with one O(3)Na3Ni2Sb octahedra, edges with two equivalent O(1)Na3MnNiSb octahedra, edges with four equivalent O(6)Na3MnNiSb octahedra, and edges with four equivalent O(2)Na3Ni2Sb octahedra. The corner-sharing octahedral tilt angles range from 0-9°. In the second O site, O(2) is bonded to one Na(1), one Na(2), one Na(3), one Ni(1), one Ni(2), and one Sb(1) atom to form ONa3Ni2Sb octahedra that share corners with two equivalent O(6)Na3MnNiSb octahedra, corners with two equivalent O(2)Na3Ni2Sb octahedra, corners with two equivalent O(4)Na3Ni2Sb octahedra,  an edgeedge with one O(6)Na3MnNiSb octahedra,  an edgeedge with one O(4)Na3Ni2Sb octahedra, edges with two equivalent O(2)Na3Ni2Sb octahedra, edges with four equivalent O(1)Na3MnNiSb octahedra, and edges with four equivalent O(3)Na3Ni2Sb octahedra. The corner-sharing octahedral tilt angles range from 1-6°. In the third O site, O(3) is bonded to one Na(1), one Na(2), one Na(6), one Ni(2), one Ni(3), and one Sb(1) atom to form ONa3Ni2Sb octahedra that share corners with two equivalent O(1)Na3MnNiSb octahedra, corners with two equivalent O(5)Na3MnNiSb octahedra, corners with two equivalent O(3)Na3Ni2Sb octahedra,  an edgeedge with one O(1)Na3MnNiSb octahedra,  an edgeedge with one O(5)Na3MnNiSb octahedra, edges with two equivalent O(3)Na3Ni2Sb octahedra, edges with four equivalent O(2)Na3Ni2Sb octahedra, and edges with four equivalent O(4)Na3Ni2Sb octahedra. The corner-sharing octahedral tilt angles range from 0-6°. In the fourth O site, O(4) is bonded to one Na(2), one Na(4), one Na(6), one Ni(2), one Ni(3), and one Sb(2) atom to form ONa3Ni2Sb octahedra that share corners with two equivalent O(6)Na3MnNiSb octahedra, corners with two equivalent O(2)Na3Ni2Sb octahedra, corners with two equivalent O(4)Na3Ni2Sb octahedra,  an edgeedge with one O(6)Na3MnNiSb octahedra,  an edgeedge with one O(2)Na3Ni2Sb octahedra, edges with two equivalent O(4)Na3Ni2Sb octahedra, edges with four equivalent O(5)Na3MnNiSb octahedra, and edges with four equivalent O(3)Na3Ni2Sb octahedra. The corner-sharing octahedral tilt angles range from 2-7°. In the fifth O site, O(5) is bonded to one Na(4), one Na(5), one Na(6), one Mn(1), one Ni(3), and one Sb(2) atom to form ONa3MnNiSb octahedra that share corners with two equivalent O(1)Na3MnNiSb octahedra, corners with two equivalent O(5)Na3MnNiSb octahedra, corners with two equivalent O(3)Na3Ni2Sb octahedra,  an edgeedge with one O(1)Na3MnNiSb octahedra,  an edgeedge with one O(3)Na3Ni2Sb octahedra, edges with two equivalent O(5)Na3MnNiSb octahedra, edges with four equivalent O(6)Na3MnNiSb octahedra, and edges with four equivalent O(4)Na3Ni2Sb octahedra. The corner-sharing octahedral tilt angles range from 1-5°. In the sixth O site, O(6) is bonded to one Na(3), one Na(4), one Na(5), one Mn(1), one Ni(1), and one Sb(2) atom to form ONa3MnNiSb octahedra that share corners with two equivalent O(6)Na3MnNiSb octahedra, corners with two equivalent O(2)Na3Ni2Sb octahedra, corners with two equivalent O(4)Na3Ni2Sb octahedra,  an edgeedge with one O(2)Na3Ni2Sb octahedra,  an edgeedge with one O(4)Na3Ni2Sb octahedra, edges with two equivalent O(6)Na3MnNiSb octahedra, edges with four equivalent O(1)Na3MnNiSb octahedra, and edges with four equivalent O(5)Na3MnNiSb octahedra. The corner-sharing octahedral tilt angles range from 2-8°.