CuMn2O4 is Spinel-like structured and crystallizes in the orthorhombic Imma space group. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form MnO4 tetrahedra that share corners with six equivalent Mn(2)O6 octahedra and corners with six equivalent Cu(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 58-60°. In the second Mn site, Mn(2) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form MnO6 octahedra that share corners with six equivalent Mn(1)O4 tetrahedra, edges with two equivalent Mn(2)O6 octahedra, and edges with four equivalent Cu(1)O6 octahedra. Cu(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form CuO6 octahedra that share corners with six equivalent Mn(1)O4 tetrahedra, edges with two equivalent Cu(1)O6 octahedra, and edges with four equivalent Mn(2)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 one Mn(1), two equivalent Mn(2), and one Cu(1) atom. In the second O site, O(2) is bonded to one Mn(1), one Mn(2), and two equivalent Cu(1) atoms to form a mixture of distorted edge and corner-sharing OMn2Cu2 trigonal pyramids.
CuMn2O4 is Spinel-like structured and crystallizes in the orthorhombic Imma space group. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form MnO4 tetrahedra that share corners with six equivalent Mn(2)O6 octahedra and corners with six equivalent Cu(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 58-60°. Both Mn(1)-O(1) bond lengths are 2.03 Å. Both Mn(1)-O(2) bond lengths are 2.02 Å. In the second Mn site, Mn(2) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form MnO6 octahedra that share corners with six equivalent Mn(1)O4 tetrahedra, edges with two equivalent Mn(2)O6 octahedra, and edges with four equivalent Cu(1)O6 octahedra. Both Mn(2)-O(2) bond lengths are 1.96 Å. All Mn(2)-O(1) bond lengths are 2.05 Å. Cu(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form CuO6 octahedra that share corners with six equivalent Mn(1)O4 tetrahedra, edges with two equivalent Cu(1)O6 octahedra, and edges with four equivalent Mn(2)O6 octahedra. Both Cu(1)-O(1) bond lengths are 2.06 Å. All Cu(1)-O(2) bond lengths are 2.08 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Mn(1), two equivalent Mn(2), and one Cu(1) atom. In the second O site, O(2) is bonded to one Mn(1), one Mn(2), and two equivalent Cu(1) atoms to form a mixture of distorted edge and corner-sharing OMn2Cu2 trigonal pyramids.