MgV2Mn2O8 crystallizes in the monoclinic C2/m space group. Mg(1) is bonded in a 6-coordinate geometry to two equivalent O(3) and four equivalent O(2) atoms. V(1) is bonded to one O(1), one O(3), and two equivalent O(2) atoms to form distorted VO4 tetrahedra that share corners with three equivalent Mn(1)O6 octahedra and corners with three equivalent Mn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-64°. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form MnO6 octahedra that share corners with six equivalent V(1)O4 tetrahedra and edges with two equivalent Mn(2)O6 octahedra. In the second Mn site, Mn(2) is bonded to two equivalent O(3) and four equivalent O(2) atoms to form MnO6 octahedra that share corners with six equivalent V(1)O4 tetrahedra and edges with two equivalent Mn(1)O6 octahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one V(1) and one Mn(1) atom. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Mg(1), one V(1), one Mn(1), and one Mn(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Mg(1), one V(1), and one Mn(2) atom.
MgV2Mn2O8 crystallizes in the monoclinic C2/m space group. Mg(1) is bonded in a 6-coordinate geometry to two equivalent O(3) and four equivalent O(2) atoms. Both Mg(1)-O(3) bond lengths are 2.48 Å. All Mg(1)-O(2) bond lengths are 2.13 Å. V(1) is bonded to one O(1), one O(3), and two equivalent O(2) atoms to form distorted VO4 tetrahedra that share corners with three equivalent Mn(1)O6 octahedra and corners with three equivalent Mn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-64°. The V(1)-O(1) bond length is 1.69 Å. The V(1)-O(3) bond length is 1.71 Å. Both V(1)-O(2) bond lengths are 1.82 Å. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form MnO6 octahedra that share corners with six equivalent V(1)O4 tetrahedra and edges with two equivalent Mn(2)O6 octahedra. Both Mn(1)-O(1) bond lengths are 2.10 Å. All Mn(1)-O(2) bond lengths are 2.32 Å. In the second Mn site, Mn(2) is bonded to two equivalent O(3) and four equivalent O(2) atoms to form MnO6 octahedra that share corners with six equivalent V(1)O4 tetrahedra and edges with two equivalent Mn(1)O6 octahedra. Both Mn(2)-O(3) bond lengths are 2.10 Å. All Mn(2)-O(2) bond lengths are 2.27 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one V(1) and one Mn(1) atom. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Mg(1), one V(1), one Mn(1), and one Mn(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Mg(1), one V(1), and one Mn(2) atom.