Materials Data on GeBi2O5 by Materials Project

Abstract

Bi2GeO5 crystallizes in the orthorhombic Cmc2_1 space group. The structure is three-dimensional. Ge4+ is bonded to four O2- atoms to form corner-sharing GeO4 tetrahedra. There are a spread of Ge–O bond distances ranging from 1.75–1.83 Å. Bi3+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Bi–O bond distances ranging from 2.20–2.57 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded to four equivalent Bi3+ atoms to form a mixture of distorted edge and corner-sharing OBi4 tetrahedra. In the second O2- site, O2- is bonded in a 1-coordinate geometry to one Ge4+ and two equivalent Bi3+ atoms. In the third O2- site, O2- is bonded in a bent 150 degrees geometry to two equivalent Ge4+ atoms.