Materials Data on CdGeO3 by Materials Project

Abstract

CdGeO3 is Orthorhombic Perovskite structured and crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Cd2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Cd–O bond distances ranging from 2.25–2.69 Å. Ge4+ is bonded to six O2- atoms to form corner-sharing GeO6 octahedra. The corner-sharing octahedra tilt angles range from 29–30°. There is two shorter (1.93 Å) and four longer (1.96 Å) Ge–O bond length. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 5-coordinate geometry to three equivalent Cd2+ and two equivalent Ge4+ atoms. In the second O2- site, O2- is bonded to two equivalent Cd2+ and two equivalent Ge4+ atoms to form distorted corner-sharing OCd2Ge2 tetrahedra.