Materials Data on Bi2O3 by Materials Project

Abstract

Bi2O3 crystallizes in the trigonal P-3m1 space group. The structure is three-dimensional. Bi3+ is bonded to seven O2- atoms to form a mixture of distorted edge and corner-sharing BiO7 pentagonal bipyramids. There are a spread of Bi–O bond distances ranging from 2.34–2.68 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to four equivalent Bi3+ atoms to form OBi4 tetrahedra that share corners with six equivalent OBi6 octahedra, corners with six equivalent OBi4 tetrahedra, edges with three equivalent OBi6 octahedra, and edges with three equivalent OBi4 tetrahedra. The corner-sharing octahedra tilt angles range from 15–57°. In the second O2- site, O2- is bonded to six equivalent Bi3+ atoms to form OBi6 octahedra that share corners with twelve equivalent OBi4 tetrahedra, edges with six equivalent OBi6 octahedra, and edges with six equivalent OBi4 tetrahedra.