MgV2Cd2(CuO4)2 crystallizes in the monoclinic C2/m space group. Mg(1) is bonded in a 6-coordinate geometry to two equivalent O(2) and four equivalent O(3) atoms. V(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(2), and two equivalent O(3) atoms. Cu(1) is bonded in a linear geometry to one O(1) and one O(2) atom. There are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded to two equivalent O(1) and four equivalent O(3) atoms to form edge-sharing CdO6 octahedra. In the second Cd site, Cd(2) is bonded to two equivalent O(2) and four equivalent O(3) atoms to form distorted edge-sharing CdO6 octahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one V(1), one Cu(1), and one Cd(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Mg(1), one V(1), one Cu(1), and one Cd(2) atom. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one V(1), one Cd(1), and one Cd(2) atom.
MgV2Cd2(CuO4)2 crystallizes in the monoclinic C2/m space group. Mg(1) is bonded in a 6-coordinate geometry to two equivalent O(2) and four equivalent O(3) atoms. Both Mg(1)-O(2) bond lengths are 2.31 Å. All Mg(1)-O(3) bond lengths are 2.11 Å. V(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(2), and two equivalent O(3) atoms. The V(1)-O(1) bond length is 1.78 Å. The V(1)-O(2) bond length is 1.78 Å. Both V(1)-O(3) bond lengths are 1.94 Å. Cu(1) is bonded in a linear geometry to one O(1) and one O(2) atom. The Cu(1)-O(1) bond length is 1.83 Å. The Cu(1)-O(2) bond length is 1.83 Å. There are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded to two equivalent O(1) and four equivalent O(3) atoms to form edge-sharing CdO6 octahedra. Both Cd(1)-O(1) bond lengths are 2.31 Å. All Cd(1)-O(3) bond lengths are 2.43 Å. In the second Cd site, Cd(2) is bonded to two equivalent O(2) and four equivalent O(3) atoms to form distorted edge-sharing CdO6 octahedra. Both Cd(2)-O(2) bond lengths are 2.73 Å. All Cd(2)-O(3) bond lengths are 2.31 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one V(1), one Cu(1), and one Cd(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Mg(1), one V(1), one Cu(1), and one Cd(2) atom. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one V(1), one Cd(1), and one Cd(2) atom.