MgCr2O4 is Spinel-like structured and crystallizes in the orthorhombic Imma 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, edges with two equivalent Mg(1)O6 octahedra, and edges with four equivalent Cr(2)O6 octahedra. There are two inequivalent Cr sites. In the first Cr site, 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 and corners with six equivalent Cr(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 53-66°. In the second Cr site, Cr(2) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form CrO6 octahedra that share corners with six equivalent Cr(1)O4 tetrahedra, edges with two equivalent Cr(2)O6 octahedra, and edges with four equivalent Mg(1)O6 octahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to two equivalent Mg(1), one Cr(1), and one Cr(2) atom. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Cr(1), and two equivalent Cr(2) atoms.
MgCr2O4 is Spinel-like structured and crystallizes in the orthorhombic Imma 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, edges with two equivalent Mg(1)O6 octahedra, and edges with four equivalent Cr(2)O6 octahedra. Both Mg(1)-O(2) bond lengths are 2.09 Å. All Mg(1)-O(1) bond lengths are 2.10 Å. There are two inequivalent Cr sites. In the first Cr site, 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 and corners with six equivalent Cr(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 53-66°. Both Cr(1)-O(1) bond lengths are 1.90 Å. Both Cr(1)-O(2) bond lengths are 1.99 Å. In the second Cr site, Cr(2) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form CrO6 octahedra that share corners with six equivalent Cr(1)O4 tetrahedra, edges with two equivalent Cr(2)O6 octahedra, and edges with four equivalent Mg(1)O6 octahedra. Both Cr(2)-O(1) bond lengths are 2.02 Å. All Cr(2)-O(2) bond lengths are 2.03 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to two equivalent Mg(1), one Cr(1), and one Cr(2) atom. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Cr(1), and two equivalent Cr(2) atoms.