Materials Data on GeBi2O5 by Materials Project

Abstract

Bi2GeO5 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Ge4+ is bonded to five O2- atoms to form distorted corner-sharing GeO5 trigonal bipyramids. There are a spread of Ge–O bond distances ranging from 1.75–2.03 Å. There are two inequivalent Bi3+ sites. In the first Bi3+ site, Bi3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Bi–O bond distances ranging from 2.27–2.76 Å. In the second Bi3+ site, Bi3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Bi–O bond distances ranging from 2.19–2.88 Å. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Ge4+ and two Bi3+ atoms. In the second O2- site, O2- is bonded in a distorted single-bond geometry to one Ge4+ and two equivalent Bi3+ atoms. In the third O2- site, O2- is bonded in a 4-coordinate geometry to one Ge4+ and three Bi3+ atoms. In the fourth O2- site, O2- is bonded in a 4-coordinate geometry to one Ge4+ and three Bi3+ atoms. In the fifth O2- site, O2- is bonded to four Bi3+ atoms to form a mixture of distorted corner and edge-sharing OBi4 tetrahedra.