MgMn4(CuO4)3 crystallizes in the cubic Im-3 space group. Mg(1) is bonded to twelve equivalent O(1) atoms to form MgO12 cuboctahedra that share faces with eight equivalent Mn(1)O6 octahedra. Mn(1) is bonded to six equivalent O(1) atoms to form MnO6 octahedra that share corners with six equivalent Mn(1)O6 octahedra and faces with two equivalent Mg(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 43°. Cu(1) is bonded in a square co-planar geometry to four equivalent O(1) atoms. O(1) is bonded in a 4-coordinate geometry to one Mg(1), two equivalent Mn(1), and one Cu(1) atom.
MgMn4(CuO4)3 crystallizes in the cubic Im-3 space group. Mg(1) is bonded to twelve equivalent O(1) atoms to form MgO12 cuboctahedra that share faces with eight equivalent Mn(1)O6 octahedra. All Mg(1)-O(1) bond lengths are 2.58 Å. Mn(1) is bonded to six equivalent O(1) atoms to form MnO6 octahedra that share corners with six equivalent Mn(1)O6 octahedra and faces with two equivalent Mg(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 43°. All Mn(1)-O(1) bond lengths are 1.98 Å. Cu(1) is bonded in a square co-planar geometry to four equivalent O(1) atoms. All Cu(1)-O(1) bond lengths are 1.89 Å. O(1) is bonded in a 4-coordinate geometry to one Mg(1), two equivalent Mn(1), and one Cu(1) atom.