Materials Data on MgMnO3 by Materials Project

Abstract

MgMnO3 is Orthorhombic Perovskite structured and crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Mg2+ is bonded in a 4-coordinate geometry to eight O2- atoms. There are a spread of Mg–O bond distances ranging from 2.06–2.62 Å. Mn4+ is bonded to six O2- atoms to form corner-sharing MnO6 octahedra. The corner-sharing octahedra tilt angles range from 40–42°. There are a spread of Mn–O bond distances ranging from 1.92–1.96 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to two equivalent Mg2+ and two equivalent Mn4+ atoms to form distorted corner-sharing OMg2Mn2 trigonal pyramids. In the second O2- site, O2- is bonded in a 5-coordinate geometry to three equivalent Mg2+ and two equivalent Mn4+ atoms.