Materials Data on CaPtO3 by Materials Project

Abstract

CaPtO3 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are two shorter (2.29 Å) and six longer (2.52 Å) Ca–O bond lengths. Pt4+ is bonded to six O2- atoms to form a mixture of edge and corner-sharing PtO6 octahedra. The corner-sharing octahedral tilt angles are 49°. There are two shorter (2.04 Å) and four longer (2.08 Å) Pt–O bond lengths. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 5-coordinate geometry to three equivalent Ca2+ and two equivalent Pt4+ atoms. In the second O2- site, O2- is bonded to two equivalent Ca2+ and two equivalent Pt4+ atoms to form distorted corner-sharing OCa2Pt2 tetrahedra.