V3Mn2NiO8 is Spinel-derived structured and crystallizes in the triclinic P1 space group. There are six inequivalent V sites. In the first V site, V(1) is bonded to one O(1), one O(13), one O(15), one O(3), one O(7), and one O(9) atom to form VO6 octahedra that share  a cornercorner with one Mn(2)O4 tetrahedra,  a cornercorner with one Mn(4)O4 tetrahedra, corners with two equivalent Mn(1)O4 tetrahedra, corners with two equivalent Mn(3)O4 tetrahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra, edges with two equivalent V(3)O6 octahedra, and edges with two equivalent V(5)O6 octahedra. In the second V site, V(2) is bonded to one O(10), one O(14), one O(16), one O(2), one O(4), and one O(8) atom to form VO6 octahedra that share  a cornercorner with one Mn(1)O4 tetrahedra,  a cornercorner with one Mn(3)O4 tetrahedra, corners with two equivalent Mn(2)O4 tetrahedra, corners with two equivalent Mn(4)O4 tetrahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra, edges with two equivalent V(4)O6 octahedra, and edges with two equivalent V(6)O6 octahedra. In the third V site, V(3) is bonded to one O(1), one O(11), one O(15), one O(3), one O(5), and one O(9) atom to form VO6 octahedra that share  a cornercorner with one Mn(2)O4 tetrahedra,  a cornercorner with one Mn(4)O4 tetrahedra, corners with two equivalent Mn(1)O4 tetrahedra, corners with two equivalent Mn(3)O4 tetrahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra, edges with two equivalent V(1)O6 octahedra, and edges with two equivalent V(5)O6 octahedra. In the fourth V site, V(4) is bonded to one O(10), one O(12), one O(16), one O(2), one O(4), and one O(6) atom to form VO6 octahedra that share  a cornercorner with one Mn(1)O4 tetrahedra,  a cornercorner with one Mn(3)O4 tetrahedra, corners with two equivalent Mn(2)O4 tetrahedra, corners with two equivalent Mn(4)O4 tetrahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra, edges with two equivalent V(2)O6 octahedra, and edges with two equivalent V(6)O6 octahedra. In the fifth V site, V(5) is bonded to one O(1), one O(11), one O(13), one O(3), one O(5), and one O(7) atom to form VO6 octahedra that share  a cornercorner with one Mn(2)O4 tetrahedra,  a cornercorner with one Mn(4)O4 tetrahedra, corners with two equivalent Mn(1)O4 tetrahedra, corners with two equivalent Mn(3)O4 tetrahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra, edges with two equivalent V(1)O6 octahedra, and edges with two equivalent V(3)O6 octahedra. In the sixth V site, V(6) is bonded to one O(12), one O(14), one O(2), one O(4), one O(6), and one O(8) atom to form VO6 octahedra that share  a cornercorner with one Mn(1)O4 tetrahedra,  a cornercorner with one Mn(3)O4 tetrahedra, corners with two equivalent Mn(2)O4 tetrahedra, corners with two equivalent Mn(4)O4 tetrahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra, edges with two equivalent V(2)O6 octahedra, and edges with two equivalent V(4)O6 octahedra. There are four inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(11), one O(13), one O(15), and one O(4) atom to form MnO4 tetrahedra that share  a cornercorner with one V(2)O6 octahedra,  a cornercorner with one V(4)O6 octahedra,  a cornercorner with one V(6)O6 octahedra, corners with two equivalent V(1)O6 octahedra, corners with two equivalent V(3)O6 octahedra, corners with two equivalent V(5)O6 octahedra, and corners with three equivalent Ni(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-70°. In the second Mn site, Mn(2) is bonded to one O(12), one O(14), one O(16), and one O(3) atom to form MnO4 tetrahedra that share  a cornercorner with one V(1)O6 octahedra,  a cornercorner with one V(3)O6 octahedra,  a cornercorner with one V(5)O6 octahedra, corners with two equivalent V(2)O6 octahedra, corners with two equivalent V(4)O6 octahedra, corners with two equivalent V(6)O6 octahedra, and corners with three equivalent Ni(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 56-64°. In the third Mn site, Mn(3) is bonded to one O(2), one O(5), one O(7), and one O(9) atom to form MnO4 tetrahedra that share  a cornercorner with one V(2)O6 octahedra,  a cornercorner with one V(4)O6 octahedra,  a cornercorner with one V(6)O6 octahedra, corners with two equivalent V(1)O6 octahedra, corners with two equivalent V(3)O6 octahedra, corners with two equivalent V(5)O6 octahedra, and corners with three equivalent Ni(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 56-65°. In the fourth Mn site, Mn(4) is bonded to one O(1), one O(10), one O(6), and one O(8) atom to form MnO4 tetrahedra that share  a cornercorner with one V(1)O6 octahedra,  a cornercorner with one V(3)O6 octahedra,  a cornercorner with one V(5)O6 octahedra, corners with two equivalent V(2)O6 octahedra, corners with two equivalent V(4)O6 octahedra, corners with two equivalent V(6)O6 octahedra, and corners with three equivalent Ni(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-70°. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to one O(12), one O(14), one O(16), one O(5), one O(7), and one O(9) atom to form NiO6 octahedra that share corners with three equivalent Mn(2)O4 tetrahedra, corners with three equivalent Mn(3)O4 tetrahedra,  an edgeedge with one V(1)O6 octahedra,  an edgeedge with one V(2)O6 octahedra,  an edgeedge with one V(3)O6 octahedra,  an edgeedge with one V(4)O6 octahedra,  an edgeedge with one V(5)O6 octahedra, and  an edgeedge with one V(6)O6 octahedra. In the second Ni site, Ni(2) is bonded to one O(10), one O(11), one O(13), one O(15), one O(6), and one O(8) atom to form NiO6 octahedra that share corners with three equivalent Mn(1)O4 tetrahedra, corners with three equivalent Mn(4)O4 tetrahedra,  an edgeedge with one V(1)O6 octahedra,  an edgeedge with one V(2)O6 octahedra,  an edgeedge with one V(3)O6 octahedra,  an edgeedge with one V(4)O6 octahedra,  an edgeedge with one V(5)O6 octahedra, and  an edgeedge with one V(6)O6 octahedra. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded to one V(1), one V(3), one V(5), and one Mn(4) atom to form a mixture of distorted edge and corner-sharing OMnV3 trigonal pyramids. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one V(2), one V(4), one V(6), and one Mn(3) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one V(1), one V(3), one V(5), and one Mn(2) atom. In the fourth O site, O(4) is bonded to one V(2), one V(4), one V(6), and one Mn(1) atom to form a mixture of distorted edge and corner-sharing OMnV3 trigonal pyramids. In the fifth O site, O(5) is bonded to one V(3), one V(5), one Mn(3), and one Ni(1) atom to form distorted OMnV2Ni trigonal pyramids that share  a cornercorner with one O(14)MnV2Ni tetrahedra,  a cornercorner with one O(16)MnV2Ni tetrahedra,  a cornercorner with one O(7)MnV2Ni tetrahedra,  a cornercorner with one O(9)MnV2Ni tetrahedra,  a cornercorner with one O(12)MnV2Ni trigonal pyramid, corners with two equivalent O(11)MnV2Ni trigonal pyramids,  an edgeedge with one O(7)MnV2Ni tetrahedra,  an edgeedge with one O(9)MnV2Ni tetrahedra, and  an edgeedge with one O(1)MnV3 trigonal pyramid. In the sixth O site, O(6) is bonded to one V(4), one V(6), one Mn(4), and one Ni(2) atom to form distorted OMnV2Ni trigonal pyramids that share  a cornercorner with one O(14)MnV2Ni tetrahedra,  a cornercorner with one O(16)MnV2Ni tetrahedra,  a cornercorner with one O(11)MnV2Ni trigonal pyramid,  a cornercorner with one O(1)MnV3 trigonal pyramid, corners with two equivalent O(12)MnV2Ni trigonal pyramids, and corners with two equivalent O(4)MnV3 trigonal pyramids. In the seventh O site, O(7) is bonded to one V(1), one V(5), one Mn(3), and one Ni(1) atom to form distorted OMnV2Ni tetrahedra that share  a cornercorner with one O(14)MnV2Ni tetrahedra,  a cornercorner with one O(16)MnV2Ni tetrahedra,  a cornercorner with one O(9)MnV2Ni tetrahedra,  a cornercorner with one O(11)MnV2Ni trigonal pyramid,  a cornercorner with one O(12)MnV2Ni trigonal pyramid,  a cornercorner with one O(5)MnV2Ni trigonal pyramid,  an edgeedge with one O(9)MnV2Ni tetrahedra,  an edgeedge with one O(5)MnV2Ni trigonal pyramid, and  an edgeedge with one O(1)MnV3 trigonal pyramid. In the eighth O site, O(8) is bonded in a rectangular see-saw-like geometry to one V(2), one V(6), one Mn(4), and one Ni(2) atom. In the ninth O site, O(9) is bonded to one V(1), one V(3), one Mn(3), and one Ni(1) atom to form distorted OMnV2Ni tetrahedra that share  a cornercorner with one O(14)MnV2Ni tetrahedra,  a cornercorner with one O(16)MnV2Ni tetrahedra,  a cornercorner with one O(7)MnV2Ni tetrahedra,  a cornercorner with one O(11)MnV2Ni trigonal pyramid,  a cornercorner with one O(12)MnV2Ni trigonal pyramid,  a cornercorner with one O(5)MnV2Ni trigonal pyramid,  an edgeedge with one O(7)MnV2Ni tetrahedra,  an edgeedge with one O(5)MnV2Ni trigonal pyramid, and  an edgeedge with one O(1)MnV3 trigonal pyramid. In the tenth O site, O(10) is bonded in a rectangular see-saw-like geometry to one V(2), one V(4), one Mn(4), and one Ni(2) atom. In the eleventh O site, O(11) is bonded to one V(3), one V(5), one Mn(1), and one Ni(2) atom to form distorted OMnV2Ni trigonal pyramids that share  a cornercorner with one O(7)MnV2Ni tetrahedra,  a cornercorner with one O(9)MnV2Ni tetrahedra,  a cornercorner with one O(6)MnV2Ni trigonal pyramid,  a cornercorner with one O(4)MnV3 trigonal pyramid, corners with two equivalent O(5)MnV2Ni trigonal pyramids, and corners with two equivalent O(1)MnV3 trigonal pyramids. In the twelfth O site, O(12) is bonded to one V(4), one V(6), one Mn(2), and one Ni(1) atom to form distorted OMnV2Ni trigonal pyramids that share  a cornercorner with one O(14)MnV2Ni tetrahedra,  a cornercorner with one O(16)MnV2Ni tetrahedra,  a cornercorner with one O(7)MnV2Ni tetrahedra,  a cornercorner with one O(9)MnV2Ni tetrahedra,  a cornercorner with one O(5)MnV2Ni trigonal pyramid, corners with two equivalent O(6)MnV2Ni trigonal pyramids,  an edgeedge with one O(14)MnV2Ni tetrahedra,  an edgeedge with one O(16)MnV2Ni tetrahedra, and  an edgeedge with one O(4)MnV3 trigonal pyramid. In the thirteenth O site, O(13) is bonded in a rectangular see-saw-like geometry to one V(1), one V(5), one Mn(1), and one Ni(2) atom. In the fourteenth O site, O(14) is bonded to one V(2), one V(6), one Mn(2), and one Ni(1) atom to form distorted OMnV2Ni tetrahedra that share  a cornercorner with one O(16)MnV2Ni tetrahedra,  a cornercorner with one O(7)MnV2Ni tetrahedra,  a cornercorner with one O(9)MnV2Ni tetrahedra,  a cornercorner with one O(12)MnV2Ni trigonal pyramid,  a cornercorner with one O(5)MnV2Ni trigonal pyramid,  a cornercorner with one O(6)MnV2Ni trigonal pyramid,  an edgeedge with one O(16)MnV2Ni tetrahedra,  an edgeedge with one O(12)MnV2Ni trigonal pyramid, and  an edgeedge with one O(4)MnV3 trigonal pyramid. In the fifteenth O site, O(15) is bonded in a rectangular see-saw-like geometry to one V(1), one V(3), one Mn(1), and one Ni(2) atom. In the sixteenth O site, O(16) is bonded to one V(2), one V(4), one Mn(2), and one Ni(1) atom to form distorted OMnV2Ni tetrahedra that share  a cornercorner with one O(14)MnV2Ni tetrahedra,  a cornercorner with one O(7)MnV2Ni tetrahedra,  a cornercorner with one O(9)MnV2Ni tetrahedra,  a cornercorner with one O(12)MnV2Ni trigonal pyramid,  a cornercorner with one O(5)MnV2Ni trigonal pyramid,  a cornercorner with one O(6)MnV2Ni trigonal pyramid,  an edgeedge with one O(14)MnV2Ni tetrahedra,  an edgeedge with one O(12)MnV2Ni trigonal pyramid, and  an edgeedge with one O(4)MnV3 trigonal pyramid.
V3Mn2NiO8 is Spinel-derived structured and crystallizes in the triclinic P1 space group. There are six inequivalent V sites. In the first V site, V(1) is bonded to one O(1), one O(13), one O(15), one O(3), one O(7), and one O(9) atom to form VO6 octahedra that share  a cornercorner with one Mn(2)O4 tetrahedra,  a cornercorner with one Mn(4)O4 tetrahedra, corners with two equivalent Mn(1)O4 tetrahedra, corners with two equivalent Mn(3)O4 tetrahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra, edges with two equivalent V(3)O6 octahedra, and edges with two equivalent V(5)O6 octahedra. The V(1)-O(1) bond length is 2.01 Å. The V(1)-O(13) bond length is 2.03 Å. The V(1)-O(15) bond length is 2.03 Å. The V(1)-O(3) bond length is 1.95 Å. The V(1)-O(7) bond length is 2.02 Å. The V(1)-O(9) bond length is 2.02 Å. In the second V site, V(2) is bonded to one O(10), one O(14), one O(16), one O(2), one O(4), and one O(8) atom to form VO6 octahedra that share  a cornercorner with one Mn(1)O4 tetrahedra,  a cornercorner with one Mn(3)O4 tetrahedra, corners with two equivalent Mn(2)O4 tetrahedra, corners with two equivalent Mn(4)O4 tetrahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra, edges with two equivalent V(4)O6 octahedra, and edges with two equivalent V(6)O6 octahedra. The V(2)-O(10) bond length is 2.03 Å. The V(2)-O(14) bond length is 2.02 Å. The V(2)-O(16) bond length is 2.02 Å. The V(2)-O(2) bond length is 1.95 Å. The V(2)-O(4) bond length is 2.01 Å. The V(2)-O(8) bond length is 2.02 Å. In the third V site, V(3) is bonded to one O(1), one O(11), one O(15), one O(3), one O(5), and one O(9) atom to form VO6 octahedra that share  a cornercorner with one Mn(2)O4 tetrahedra,  a cornercorner with one Mn(4)O4 tetrahedra, corners with two equivalent Mn(1)O4 tetrahedra, corners with two equivalent Mn(3)O4 tetrahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra, edges with two equivalent V(1)O6 octahedra, and edges with two equivalent V(5)O6 octahedra. The V(3)-O(1) bond length is 2.05 Å. The V(3)-O(11) bond length is 1.99 Å. The V(3)-O(15) bond length is 1.96 Å. The V(3)-O(3) bond length is 2.05 Å. The V(3)-O(5) bond length is 1.99 Å. The V(3)-O(9) bond length is 1.97 Å. In the fourth V site, V(4) is bonded to one O(10), one O(12), one O(16), one O(2), one O(4), and one O(6) atom to form VO6 octahedra that share  a cornercorner with one Mn(1)O4 tetrahedra,  a cornercorner with one Mn(3)O4 tetrahedra, corners with two equivalent Mn(2)O4 tetrahedra, corners with two equivalent Mn(4)O4 tetrahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra, edges with two equivalent V(2)O6 octahedra, and edges with two equivalent V(6)O6 octahedra. The V(4)-O(10) bond length is 1.95 Å. The V(4)-O(12) bond length is 1.99 Å. The V(4)-O(16) bond length is 1.97 Å. The V(4)-O(2) bond length is 2.05 Å. The V(4)-O(4) bond length is 2.05 Å. The V(4)-O(6) bond length is 1.99 Å. In the fifth V site, V(5) is bonded to one O(1), one O(11), one O(13), one O(3), one O(5), and one O(7) atom to form VO6 octahedra that share  a cornercorner with one Mn(2)O4 tetrahedra,  a cornercorner with one Mn(4)O4 tetrahedra, corners with two equivalent Mn(1)O4 tetrahedra, corners with two equivalent Mn(3)O4 tetrahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra, edges with two equivalent V(1)O6 octahedra, and edges with two equivalent V(3)O6 octahedra. The V(5)-O(1) bond length is 2.05 Å. The V(5)-O(11) bond length is 1.99 Å. The V(5)-O(13) bond length is 1.96 Å. The V(5)-O(3) bond length is 2.05 Å. The V(5)-O(5) bond length is 1.99 Å. The V(5)-O(7) bond length is 1.97 Å. In the sixth V site, V(6) is bonded to one O(12), one O(14), one O(2), one O(4), one O(6), and one O(8) atom to form VO6 octahedra that share  a cornercorner with one Mn(1)O4 tetrahedra,  a cornercorner with one Mn(3)O4 tetrahedra, corners with two equivalent Mn(2)O4 tetrahedra, corners with two equivalent Mn(4)O4 tetrahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra, edges with two equivalent V(2)O6 octahedra, and edges with two equivalent V(4)O6 octahedra. The V(6)-O(12) bond length is 1.99 Å. The V(6)-O(14) bond length is 1.97 Å. The V(6)-O(2) bond length is 2.05 Å. The V(6)-O(4) bond length is 2.05 Å. The V(6)-O(6) bond length is 1.99 Å. The V(6)-O(8) bond length is 1.96 Å. There are four inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(11), one O(13), one O(15), and one O(4) atom to form MnO4 tetrahedra that share  a cornercorner with one V(2)O6 octahedra,  a cornercorner with one V(4)O6 octahedra,  a cornercorner with one V(6)O6 octahedra, corners with two equivalent V(1)O6 octahedra, corners with two equivalent V(3)O6 octahedra, corners with two equivalent V(5)O6 octahedra, and corners with three equivalent Ni(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-70°. The Mn(1)-O(11) bond length is 2.01 Å. The Mn(1)-O(13) bond length is 2.02 Å. The Mn(1)-O(15) bond length is 2.02 Å. The Mn(1)-O(4) bond length is 2.01 Å. In the second Mn site, Mn(2) is bonded to one O(12), one O(14), one O(16), and one O(3) atom to form MnO4 tetrahedra that share  a cornercorner with one V(1)O6 octahedra,  a cornercorner with one V(3)O6 octahedra,  a cornercorner with one V(5)O6 octahedra, corners with two equivalent V(2)O6 octahedra, corners with two equivalent V(4)O6 octahedra, corners with two equivalent V(6)O6 octahedra, and corners with three equivalent Ni(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 56-64°. The Mn(2)-O(12) bond length is 2.00 Å. The Mn(2)-O(14) bond length is 2.00 Å. The Mn(2)-O(16) bond length is 2.00 Å. The Mn(2)-O(3) bond length is 2.01 Å. In the third Mn site, Mn(3) is bonded to one O(2), one O(5), one O(7), and one O(9) atom to form MnO4 tetrahedra that share  a cornercorner with one V(2)O6 octahedra,  a cornercorner with one V(4)O6 octahedra,  a cornercorner with one V(6)O6 octahedra, corners with two equivalent V(1)O6 octahedra, corners with two equivalent V(3)O6 octahedra, corners with two equivalent V(5)O6 octahedra, and corners with three equivalent Ni(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 56-65°. The Mn(3)-O(2) bond length is 2.01 Å. The Mn(3)-O(5) bond length is 2.00 Å. The Mn(3)-O(7) bond length is 2.00 Å. The Mn(3)-O(9) bond length is 2.00 Å. In the fourth Mn site, Mn(4) is bonded to one O(1), one O(10), one O(6), and one O(8) atom to form MnO4 tetrahedra that share  a cornercorner with one V(1)O6 octahedra,  a cornercorner with one V(3)O6 octahedra,  a cornercorner with one V(5)O6 octahedra, corners with two equivalent V(2)O6 octahedra, corners with two equivalent V(4)O6 octahedra, corners with two equivalent V(6)O6 octahedra, and corners with three equivalent Ni(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-70°. The Mn(4)-O(1) bond length is 2.02 Å. The Mn(4)-O(10) bond length is 2.02 Å. The Mn(4)-O(6) bond length is 2.00 Å. The Mn(4)-O(8) bond length is 2.02 Å. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to one O(12), one O(14), one O(16), one O(5), one O(7), and one O(9) atom to form NiO6 octahedra that share corners with three equivalent Mn(2)O4 tetrahedra, corners with three equivalent Mn(3)O4 tetrahedra,  an edgeedge with one V(1)O6 octahedra,  an edgeedge with one V(2)O6 octahedra,  an edgeedge with one V(3)O6 octahedra,  an edgeedge with one V(4)O6 octahedra,  an edgeedge with one V(5)O6 octahedra, and  an edgeedge with one V(6)O6 octahedra. The Ni(1)-O(12) bond length is 2.10 Å. The Ni(1)-O(14) bond length is 2.07 Å. The Ni(1)-O(16) bond length is 2.07 Å. The Ni(1)-O(5) bond length is 2.09 Å. The Ni(1)-O(7) bond length is 2.07 Å. The Ni(1)-O(9) bond length is 2.07 Å. In the second Ni site, Ni(2) is bonded to one O(10), one O(11), one O(13), one O(15), one O(6), and one O(8) atom to form NiO6 octahedra that share corners with three equivalent Mn(1)O4 tetrahedra, corners with three equivalent Mn(4)O4 tetrahedra,  an edgeedge with one V(1)O6 octahedra,  an edgeedge with one V(2)O6 octahedra,  an edgeedge with one V(3)O6 octahedra,  an edgeedge with one V(4)O6 octahedra,  an edgeedge with one V(5)O6 octahedra, and  an edgeedge with one V(6)O6 octahedra. The Ni(2)-O(10) bond length is 2.06 Å. The Ni(2)-O(11) bond length is 2.08 Å. The Ni(2)-O(13) bond length is 2.06 Å. The Ni(2)-O(15) bond length is 2.06 Å. The Ni(2)-O(6) bond length is 2.08 Å. The Ni(2)-O(8) bond length is 2.06 Å. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded to one V(1), one V(3), one V(5), and one Mn(4) atom to form a mixture of distorted edge and corner-sharing OMnV3 trigonal pyramids. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one V(2), one V(4), one V(6), and one Mn(3) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one V(1), one V(3), one V(5), and one Mn(2) atom. In the fourth O site, O(4) is bonded to one V(2), one V(4), one V(6), and one Mn(1) atom to form a mixture of distorted edge and corner-sharing OMnV3 trigonal pyramids. In the fifth O site, O(5) is bonded to one V(3), one V(5), one Mn(3), and one Ni(1) atom to form distorted OMnV2Ni trigonal pyramids that share  a cornercorner with one O(14)MnV2Ni tetrahedra,  a cornercorner with one O(16)MnV2Ni tetrahedra,  a cornercorner with one O(7)MnV2Ni tetrahedra,  a cornercorner with one O(9)MnV2Ni tetrahedra,  a cornercorner with one O(12)MnV2Ni trigonal pyramid, corners with two equivalent O(11)MnV2Ni trigonal pyramids,  an edgeedge with one O(7)MnV2Ni tetrahedra,  an edgeedge with one O(9)MnV2Ni tetrahedra, and  an edgeedge with one O(1)MnV3 trigonal pyramid. In the sixth O site, O(6) is bonded to one V(4), one V(6), one Mn(4), and one Ni(2) atom to form distorted OMnV2Ni trigonal pyramids that share  a cornercorner with one O(14)MnV2Ni tetrahedra,  a cornercorner with one O(16)MnV2Ni tetrahedra,  a cornercorner with one O(11)MnV2Ni trigonal pyramid,  a cornercorner with one O(1)MnV3 trigonal pyramid, corners with two equivalent O(12)MnV2Ni trigonal pyramids, and corners with two equivalent O(4)MnV3 trigonal pyramids. In the seventh O site, O(7) is bonded to one V(1), one V(5), one Mn(3), and one Ni(1) atom to form distorted OMnV2Ni tetrahedra that share  a cornercorner with one O(14)MnV2Ni tetrahedra,  a cornercorner with one O(16)MnV2Ni tetrahedra,  a cornercorner with one O(9)MnV2Ni tetrahedra,  a cornercorner with one O(11)MnV2Ni trigonal pyramid,  a cornercorner with one O(12)MnV2Ni trigonal pyramid,  a cornercorner with one O(5)MnV2Ni trigonal pyramid,  an edgeedge with one O(9)MnV2Ni tetrahedra,  an edgeedge with one O(5)MnV2Ni trigonal pyramid, and  an edgeedge with one O(1)MnV3 trigonal pyramid. In the eighth O site, O(8) is bonded in a rectangular see-saw-like geometry to one V(2), one V(6), one Mn(4), and one Ni(2) atom. In the ninth O site, O(9) is bonded to one V(1), one V(3), one Mn(3), and one Ni(1) atom to form distorted OMnV2Ni tetrahedra that share  a cornercorner with one O(14)MnV2Ni tetrahedra,  a cornercorner with one O(16)MnV2Ni tetrahedra,  a cornercorner with one O(7)MnV2Ni tetrahedra,  a cornercorner with one O(11)MnV2Ni trigonal pyramid,  a cornercorner with one O(12)MnV2Ni trigonal pyramid,  a cornercorner with one O(5)MnV2Ni trigonal pyramid,  an edgeedge with one O(7)MnV2Ni tetrahedra,  an edgeedge with one O(5)MnV2Ni trigonal pyramid, and  an edgeedge with one O(1)MnV3 trigonal pyramid. In the tenth O site, O(10) is bonded in a rectangular see-saw-like geometry to one V(2), one V(4), one Mn(4), and one Ni(2) atom. In the eleventh O site, O(11) is bonded to one V(3), one V(5), one Mn(1), and one Ni(2) atom to form distorted OMnV2Ni trigonal pyramids that share  a cornercorner with one O(7)MnV2Ni tetrahedra,  a cornercorner with one O(9)MnV2Ni tetrahedra,  a cornercorner with one O(6)MnV2Ni trigonal pyramid,  a cornercorner with one O(4)MnV3 trigonal pyramid, corners with two equivalent O(5)MnV2Ni trigonal pyramids, and corners with two equivalent O(1)MnV3 trigonal pyramids. In the twelfth O site, O(12) is bonded to one V(4), one V(6), one Mn(2), and one Ni(1) atom to form distorted OMnV2Ni trigonal pyramids that share  a cornercorner with one O(14)MnV2Ni tetrahedra,  a cornercorner with one O(16)MnV2Ni tetrahedra,  a cornercorner with one O(7)MnV2Ni tetrahedra,  a cornercorner with one O(9)MnV2Ni tetrahedra,  a cornercorner with one O(5)MnV2Ni trigonal pyramid, corners with two equivalent O(6)MnV2Ni trigonal pyramids,  an edgeedge with one O(14)MnV2Ni tetrahedra,  an edgeedge with one O(16)MnV2Ni tetrahedra, and  an edgeedge with one O(4)MnV3 trigonal pyramid. In the thirteenth O site, O(13) is bonded in a rectangular see-saw-like geometry to one V(1), one V(5), one Mn(1), and one Ni(2) atom. In the fourteenth O site, O(14) is bonded to one V(2), one V(6), one Mn(2), and one Ni(1) atom to form distorted OMnV2Ni tetrahedra that share  a cornercorner with one O(16)MnV2Ni tetrahedra,  a cornercorner with one O(7)MnV2Ni tetrahedra,  a cornercorner with one O(9)MnV2Ni tetrahedra,  a cornercorner with one O(12)MnV2Ni trigonal pyramid,  a cornercorner with one O(5)MnV2Ni trigonal pyramid,  a cornercorner with one O(6)MnV2Ni trigonal pyramid,  an edgeedge with one O(16)MnV2Ni tetrahedra,  an edgeedge with one O(12)MnV2Ni trigonal pyramid, and  an edgeedge with one O(4)MnV3 trigonal pyramid. In the fifteenth O site, O(15) is bonded in a rectangular see-saw-like geometry to one V(1), one V(3), one Mn(1), and one Ni(2) atom. In the sixteenth O site, O(16) is bonded to one V(2), one V(4), one Mn(2), and one Ni(1) atom to form distorted OMnV2Ni tetrahedra that share  a cornercorner with one O(14)MnV2Ni tetrahedra,  a cornercorner with one O(7)MnV2Ni tetrahedra,  a cornercorner with one O(9)MnV2Ni tetrahedra,  a cornercorner with one O(12)MnV2Ni trigonal pyramid,  a cornercorner with one O(5)MnV2Ni trigonal pyramid,  a cornercorner with one O(6)MnV2Ni trigonal pyramid,  an edgeedge with one O(14)MnV2Ni tetrahedra,  an edgeedge with one O(12)MnV2Ni trigonal pyramid, and  an edgeedge with one O(4)MnV3 trigonal pyramid.