Materials Data on Mg6MnO8 by Materials Project
Mg6MnO8 crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with six equivalent MgO6 octahedra, edges with two equivalent MnO6 octahedra, and edges with eight equivalent MgO6 octahedra. The corner-sharing octahedra tilt angles range from 0–9°. There are two shorter (2.12 Å) and four longer (2.13 Å) Mg–O bond lengths. Mn4+ is bonded to six equivalent O2- atoms to form MnO6 octahedra that share edges with twelve equivalent MgO6 octahedra. All Mn–O bond lengths are 1.94 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to six equivalent Mg2+ atoms to form OMg6 octahedra that share corners with six equivalent OMg6 octahedra and edges with twelve equivalent OMg4Mn square pyramids. The corner-sharing octahedral tilt angles are 0°. In the second O2- site, O2- is bonded to four equivalent Mg2+ and one Mn4+ atom to form OMg4Mn square pyramids that share corners with nine equivalent OMg4Mn square pyramids, edges with four equivalent OMg6 octahedra, and edges with four equivalent OMg4Mn square pyramids.