MgCoMnO4 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(1), one O(4), and two equivalent O(3) atoms to form distorted MgO4 tetrahedra that share corners with four equivalent Mn(1)O6 octahedra, corners with two equivalent Mg(1)O4 tetrahedra, and  an edgeedge with one Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 2-57°. Mn(1) is bonded to one O(1), one O(4), two equivalent O(2), and two equivalent O(3) atoms to form MnO6 octahedra that share corners with four equivalent Mg(1)O4 tetrahedra, edges with two equivalent Mn(1)O6 octahedra, and  an edgeedge with one Mg(1)O4 tetrahedra. Co(1) is bonded in a 5-coordinate geometry to one O(2), two equivalent O(1), and two equivalent O(4) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Mn(1), and two equivalent Co(1) atoms. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent Mn(1) and one Co(1) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to two equivalent Mg(1) and two equivalent Mn(1) atoms. In the fourth O site, O(4) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Mn(1), and two equivalent Co(1) atoms.
MgCoMnO4 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(1), one O(4), and two equivalent O(3) atoms to form distorted MgO4 tetrahedra that share corners with four equivalent Mn(1)O6 octahedra, corners with two equivalent Mg(1)O4 tetrahedra, and  an edgeedge with one Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 2-57°. The Mg(1)-O(1) bond length is 1.98 Å. The Mg(1)-O(4) bond length is 1.98 Å. Both Mg(1)-O(3) bond lengths are 1.98 Å. Mn(1) is bonded to one O(1), one O(4), two equivalent O(2), and two equivalent O(3) atoms to form MnO6 octahedra that share corners with four equivalent Mg(1)O4 tetrahedra, edges with two equivalent Mn(1)O6 octahedra, and  an edgeedge with one Mg(1)O4 tetrahedra. The Mn(1)-O(1) bond length is 1.92 Å. The Mn(1)-O(4) bond length is 1.93 Å. Both Mn(1)-O(2) bond lengths are 1.92 Å. There is one shorter (2.03 Å) and one longer (2.04 Å) Mn(1)-O(3) bond length. Co(1) is bonded in a 5-coordinate geometry to one O(2), two equivalent O(1), and two equivalent O(4) atoms. The Co(1)-O(2) bond length is 1.98 Å. There is one shorter (2.02 Å) and one longer (2.19 Å) Co(1)-O(1) bond length. There is one shorter (2.04 Å) and one longer (2.09 Å) Co(1)-O(4) bond length. There are four inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Mn(1), and two equivalent Co(1) atoms. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent Mn(1) and one Co(1) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to two equivalent Mg(1) and two equivalent Mn(1) atoms. In the fourth O site, O(4) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Mn(1), and two equivalent Co(1) atoms.