CrMn4O8 is beta indium sulfide-derived structured and crystallizes in the monoclinic C2/m space group. Cr(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form CrO6 octahedra that share edges with two equivalent Mn(1)O6 octahedra, edges with two equivalent Mn(2)O6 octahedra, and edges with four equivalent Mn(3)O6 octahedra. There are three inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent O(3) and four equivalent O(2) atoms to form distorted MnO6 octahedra that share corners with six equivalent Mn(2)O6 octahedra, edges with two equivalent Cr(1)O6 octahedra, and edges with four equivalent Mn(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 14-15°. In the second Mn site, Mn(2) is bonded to two equivalent O(3) and four equivalent O(2) atoms to form MnO6 octahedra that share corners with six equivalent Mn(1)O6 octahedra, edges with two equivalent Cr(1)O6 octahedra, and edges with four equivalent Mn(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 14-15°. In the third Mn site, Mn(3) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form MnO6 octahedra that share edges with two equivalent Cr(1)O6 octahedra, edges with two equivalent Mn(1)O6 octahedra, edges with two equivalent Mn(2)O6 octahedra, and edges with two equivalent Mn(3)O6 octahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one Cr(1) and two equivalent Mn(3) atoms. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Cr(1), one Mn(1), one Mn(2), and one Mn(3) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Mn(1), one Mn(2), and two equivalent Mn(3) atoms.
CrMn4O8 is beta indium sulfide-derived structured and crystallizes in the monoclinic C2/m space group. Cr(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form CrO6 octahedra that share edges with two equivalent Mn(1)O6 octahedra, edges with two equivalent Mn(2)O6 octahedra, and edges with four equivalent Mn(3)O6 octahedra. Both Cr(1)-O(1) bond lengths are 2.04 Å. All Cr(1)-O(2) bond lengths are 2.01 Å. There are three inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent O(3) and four equivalent O(2) atoms to form distorted MnO6 octahedra that share corners with six equivalent Mn(2)O6 octahedra, edges with two equivalent Cr(1)O6 octahedra, and edges with four equivalent Mn(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 14-15°. Both Mn(1)-O(3) bond lengths are 2.15 Å. All Mn(1)-O(2) bond lengths are 2.27 Å. In the second Mn site, Mn(2) is bonded to two equivalent O(3) and four equivalent O(2) atoms to form MnO6 octahedra that share corners with six equivalent Mn(1)O6 octahedra, edges with two equivalent Cr(1)O6 octahedra, and edges with four equivalent Mn(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 14-15°. Both Mn(2)-O(3) bond lengths are 2.25 Å. All Mn(2)-O(2) bond lengths are 2.01 Å. In the third Mn site, Mn(3) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form MnO6 octahedra that share edges with two equivalent Cr(1)O6 octahedra, edges with two equivalent Mn(1)O6 octahedra, edges with two equivalent Mn(2)O6 octahedra, and edges with two equivalent Mn(3)O6 octahedra. Both Mn(3)-O(1) bond lengths are 1.95 Å. Both Mn(3)-O(2) bond lengths are 1.95 Å. Both Mn(3)-O(3) bond lengths are 1.94 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one Cr(1) and two equivalent Mn(3) atoms. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Cr(1), one Mn(1), one Mn(2), and one Mn(3) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Mn(1), one Mn(2), and two equivalent Mn(3) atoms.