Materials Data on SrCaMn2O6 by Materials Project

Abstract

SrCaMn2O6 is Orthorhombic Perovskite-derived structured and crystallizes in the orthorhombic Pmc2_1 space group. The structure is three-dimensional. Sr2+ is bonded in a 12-coordinate geometry to twelve O2- atoms. There are a spread of Sr–O bond distances ranging from 2.53–3.06 Å. Ca2+ is bonded in a 12-coordinate geometry to nine O2- atoms. There are a spread of Ca–O bond distances ranging from 2.39–2.76 Å. Mn4+ is bonded to six O2- atoms to form corner-sharing MnO6 octahedra. The corner-sharing octahedra tilt angles range from 13–21°. There are a spread of Mn–O bond distances ranging from 1.92–1.97 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Sr2+, two equivalent Ca2+, and two equivalent Mn4+ atoms. In the second O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Sr2+, one Ca2+, and two equivalent Mn4+ atoms. In the third O2- site, O2- is bonded in a 5-coordinate geometry to three equivalent Ca2+ and two equivalent Mn4+ atoms. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to four equivalent Sr2+ and two equivalent Mn4+ atoms.