FeMnO4 is Hydrophilite-derived structured and crystallizes in the monoclinic P2/c space group. Mn(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form MnO6 octahedra that share corners with eight equivalent Fe(1)O6 octahedra and edges with two equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 47-54°. Fe(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form FeO6 octahedra that share corners with eight equivalent Mn(1)O6 octahedra and edges with two equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 47-54°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to two equivalent Mn(1) and one Fe(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Mn(1) and two equivalent Fe(1) atoms.
FeMnO4 is Hydrophilite-derived structured and crystallizes in the monoclinic P2/c space group. Mn(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form MnO6 octahedra that share corners with eight equivalent Fe(1)O6 octahedra and edges with two equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 47-54°. Both Mn(1)-O(2) bond lengths are 1.87 Å. There are two shorter (1.91 Å) and two longer (1.94 Å) Mn(1)-O(1) bond lengths. Fe(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form FeO6 octahedra that share corners with eight equivalent Mn(1)O6 octahedra and edges with two equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 47-54°. Both Fe(1)-O(1) bond lengths are 2.00 Å. There are two shorter (2.02 Å) and two longer (2.06 Å) Fe(1)-O(2) bond lengths. There are two inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to two equivalent Mn(1) and one Fe(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Mn(1) and two equivalent Fe(1) atoms.