Materials Data on Mn5CrO12 by Materials Project
CrMn2O6(MnO2)3 is trigonal omega-derived structured and crystallizes in the monoclinic C2/m space group. The structure is two-dimensional and consists of one CrMn2O6 sheet oriented in the (0, 0, 1) direction and one MnO2 sheet oriented in the (0, 0, 1) direction. In the CrMn2O6 sheet, Cr4+ is bonded to six O2- atoms to form CrO6 octahedra that share edges with six equivalent MnO6 octahedra. There is two shorter (1.93 Å) and four longer (1.95 Å) Cr–O bond length. Mn4+ is bonded to six O2- atoms to form MnO6 octahedra that share edges with three equivalent CrO6 octahedra and edges with three equivalent MnO6 octahedra. There are a spread of Mn–O bond distances ranging from 1.93–1.95 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to one Cr4+ and two equivalent Mn4+ atoms. In the second O2- site, O2- is bonded in a 3-coordinate geometry to one Cr4+ and two equivalent Mn4+ atoms. In the MnO2 sheet, there are two inequivalent Mn4+ sites. In the first Mn4+ site, Mn4+ is bonded to six O2- atoms to form edge-sharing MnO6 octahedra. All Mn–O bond lengths are 1.94 Å. In the second Mn4+ site, Mn4+ is bonded to six O2- atoms to form edge-sharing MnO6 octahedra. All Mn–O bond lengths are 1.94 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to three Mn4+ atoms. In the second O2- site, O2- is bonded in a 3-coordinate geometry to three Mn4+ atoms.