MgV2Ni(TeO5)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded in a distorted square co-planar geometry to one O(2), one O(3), one O(8), and one O(9) atom. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(1), one O(10), one O(4), one O(5), one O(7), and one O(9) atom to form VO6 octahedra that share corners with three equivalent Ni(1)O6 octahedra and edges with two equivalent V(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 44-62°. In the second V site, V(2) is bonded to one O(1), one O(10), one O(2), one O(4), one O(6), and one O(7) atom to form VO6 octahedra that share corners with three equivalent Ni(1)O6 octahedra and edges with two equivalent V(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 44-62°. Ni(1) is bonded to one O(1), one O(10), one O(2), one O(3), one O(8), and one O(9) atom to form NiO6 octahedra that share corners with three equivalent V(1)O6 octahedra and corners with three equivalent V(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 44-62°. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded in a 3-coordinate geometry to one O(1), one O(5), one O(6), one O(7), and one O(8) atom. In the second Te site, Te(2) is bonded in a 3-coordinate geometry to one O(10), one O(3), one O(4), one O(5), and one O(6) atom. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one V(1), one V(2), one Ni(1), and one Te(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Mg(1), one V(2), and one Ni(1) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Mg(1), one Ni(1), and one Te(2) atom. In the fourth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one V(1), one V(2), and one Te(2) atom. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one V(1), one Te(1), and one Te(2) atom. In the sixth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one V(2), one Te(1), and one Te(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to one V(1), one V(2), and one Te(1) atom. In the eighth O site, O(8) is bonded in a trigonal planar geometry to one Mg(1), one Ni(1), and one Te(1) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Mg(1), one V(1), and one Ni(1) atom. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to one V(1), one V(2), one Ni(1), and one Te(2) atom.
MgV2Ni(TeO5)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded in a distorted square co-planar geometry to one O(2), one O(3), one O(8), and one O(9) atom. The Mg(1)-O(2) bond length is 2.10 Å. The Mg(1)-O(3) bond length is 1.98 Å. The Mg(1)-O(8) bond length is 1.98 Å. The Mg(1)-O(9) bond length is 2.10 Å. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(1), one O(10), one O(4), one O(5), one O(7), and one O(9) atom to form VO6 octahedra that share corners with three equivalent Ni(1)O6 octahedra and edges with two equivalent V(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 44-62°. The V(1)-O(1) bond length is 2.05 Å. The V(1)-O(10) bond length is 1.96 Å. The V(1)-O(4) bond length is 1.98 Å. The V(1)-O(5) bond length is 2.00 Å. The V(1)-O(7) bond length is 2.10 Å. The V(1)-O(9) bond length is 1.78 Å. In the second V site, V(2) is bonded to one O(1), one O(10), one O(2), one O(4), one O(6), and one O(7) atom to form VO6 octahedra that share corners with three equivalent Ni(1)O6 octahedra and edges with two equivalent V(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 44-62°. The V(2)-O(1) bond length is 1.96 Å. The V(2)-O(10) bond length is 2.05 Å. The V(2)-O(2) bond length is 1.78 Å. The V(2)-O(4) bond length is 2.10 Å. The V(2)-O(6) bond length is 2.00 Å. The V(2)-O(7) bond length is 1.98 Å. Ni(1) is bonded to one O(1), one O(10), one O(2), one O(3), one O(8), and one O(9) atom to form NiO6 octahedra that share corners with three equivalent V(1)O6 octahedra and corners with three equivalent V(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 44-62°. The Ni(1)-O(1) bond length is 2.36 Å. The Ni(1)-O(10) bond length is 2.31 Å. The Ni(1)-O(2) bond length is 2.22 Å. The Ni(1)-O(3) bond length is 2.07 Å. The Ni(1)-O(8) bond length is 2.07 Å. The Ni(1)-O(9) bond length is 2.21 Å. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded in a 3-coordinate geometry to one O(1), one O(5), one O(6), one O(7), and one O(8) atom. The Te(1)-O(1) bond length is 2.48 Å. The Te(1)-O(5) bond length is 2.36 Å. The Te(1)-O(6) bond length is 1.94 Å. The Te(1)-O(7) bond length is 1.92 Å. The Te(1)-O(8) bond length is 1.94 Å. In the second Te site, Te(2) is bonded in a 3-coordinate geometry to one O(10), one O(3), one O(4), one O(5), and one O(6) atom. The Te(2)-O(10) bond length is 2.49 Å. The Te(2)-O(3) bond length is 1.94 Å. The Te(2)-O(4) bond length is 1.92 Å. The Te(2)-O(5) bond length is 1.94 Å. The Te(2)-O(6) bond length is 2.37 Å. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one V(1), one V(2), one Ni(1), and one Te(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Mg(1), one V(2), and one Ni(1) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Mg(1), one Ni(1), and one Te(2) atom. In the fourth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one V(1), one V(2), and one Te(2) atom. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one V(1), one Te(1), and one Te(2) atom. In the sixth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one V(2), one Te(1), and one Te(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to one V(1), one V(2), and one Te(1) atom. In the eighth O site, O(8) is bonded in a trigonal planar geometry to one Mg(1), one Ni(1), and one Te(1) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Mg(1), one V(1), and one Ni(1) atom. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to one V(1), one V(2), one Ni(1), and one Te(2) atom.