MgCrO4 crystallizes in the orthorhombic Cmcm space group. Mg(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form MgO6 octahedra that share corners with six equivalent Cr(1)O4 tetrahedra and edges with two equivalent Mg(1)O6 octahedra. Cr(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form CrO4 tetrahedra that share corners with six equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 47-54°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Mg(1) and one Cr(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Mg(1) and one Cr(1) atom.
MgCrO4 crystallizes in the orthorhombic Cmcm space group. Mg(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form MgO6 octahedra that share corners with six equivalent Cr(1)O4 tetrahedra and edges with two equivalent Mg(1)O6 octahedra. Both Mg(1)-O(2) bond lengths are 2.07 Å. All Mg(1)-O(1) bond lengths are 2.10 Å. Cr(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form CrO4 tetrahedra that share corners with six equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 47-54°. Both Cr(1)-O(1) bond lengths are 1.68 Å. Both Cr(1)-O(2) bond lengths are 1.62 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Mg(1) and one Cr(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Mg(1) and one Cr(1) atom.