MgFeCrO4 is Spinel-derived structured and crystallizes in the orthorhombic Imma space group. Mg(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form MgO4 tetrahedra that share corners with six equivalent Cr(1)O6 octahedra and corners with six equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 58-59°. Cr(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form CrO6 octahedra that share corners with six equivalent Mg(1)O4 tetrahedra, edges with two equivalent Cr(1)O6 octahedra, and edges with four equivalent Fe(1)O6 octahedra. Fe(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form FeO6 octahedra that share corners with six equivalent Mg(1)O4 tetrahedra, edges with two equivalent Fe(1)O6 octahedra, and edges with four equivalent Cr(1)O6 octahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), two equivalent Cr(1), and one Fe(1) atom to form distorted OMgCr2Fe trigonal pyramids that share corners with six equivalent O(1)MgCr2Fe trigonal pyramids, corners with six equivalent O(2)MgCrFe2 trigonal pyramids,  an edgeedge with one O(1)MgCr2Fe trigonal pyramid, and edges with two equivalent O(2)MgCrFe2 trigonal pyramids. In the second O site, O(2) is bonded to one Mg(1), one Cr(1), and two equivalent Fe(1) atoms to form distorted OMgCrFe2 trigonal pyramids that share corners with six equivalent O(1)MgCr2Fe trigonal pyramids, corners with six equivalent O(2)MgCrFe2 trigonal pyramids,  an edgeedge with one O(2)MgCrFe2 trigonal pyramid, and edges with two equivalent O(1)MgCr2Fe trigonal pyramids.
MgFeCrO4 is Spinel-derived structured and crystallizes in the orthorhombic Imma space group. Mg(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form MgO4 tetrahedra that share corners with six equivalent Cr(1)O6 octahedra and corners with six equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 58-59°. Both Mg(1)-O(1) bond lengths are 2.01 Å. Both Mg(1)-O(2) bond lengths are 2.00 Å. Cr(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form CrO6 octahedra that share corners with six equivalent Mg(1)O4 tetrahedra, edges with two equivalent Cr(1)O6 octahedra, and edges with four equivalent Fe(1)O6 octahedra. Both Cr(1)-O(2) bond lengths are 2.04 Å. All Cr(1)-O(1) bond lengths are 2.04 Å. Fe(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form FeO6 octahedra that share corners with six equivalent Mg(1)O4 tetrahedra, edges with two equivalent Fe(1)O6 octahedra, and edges with four equivalent Cr(1)O6 octahedra. Both Fe(1)-O(1) bond lengths are 2.05 Å. All Fe(1)-O(2) bond lengths are 2.05 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), two equivalent Cr(1), and one Fe(1) atom to form distorted OMgCr2Fe trigonal pyramids that share corners with six equivalent O(1)MgCr2Fe trigonal pyramids, corners with six equivalent O(2)MgCrFe2 trigonal pyramids,  an edgeedge with one O(1)MgCr2Fe trigonal pyramid, and edges with two equivalent O(2)MgCrFe2 trigonal pyramids. In the second O site, O(2) is bonded to one Mg(1), one Cr(1), and two equivalent Fe(1) atoms to form distorted OMgCrFe2 trigonal pyramids that share corners with six equivalent O(1)MgCr2Fe trigonal pyramids, corners with six equivalent O(2)MgCrFe2 trigonal pyramids,  an edgeedge with one O(2)MgCrFe2 trigonal pyramid, and edges with two equivalent O(1)MgCr2Fe trigonal pyramids.