Materials Data on Tb(BiO2)3 by Materials Project

Abstract

Tb(BiO2)3 is Ilmenite-like structured and crystallizes in the cubic I2_13 space group. The structure is three-dimensional. Tb3+ is bonded to six O2- atoms to form TbO6 octahedra that share corners with six BiO6 octahedra and edges with six BiO6 octahedra. The corner-sharing octahedra tilt angles range from 53–54°. There are three shorter (2.32 Å) and three longer (2.34 Å) Tb–O bond lengths. There are two inequivalent Bi3+ sites. In the first Bi3+ site, Bi3+ is bonded to six O2- atoms to form distorted BiO6 octahedra that share corners with two equivalent TbO6 octahedra, corners with four equivalent BiO6 octahedra, edges with two equivalent TbO6 octahedra, and edges with four equivalent BiO6 octahedra. The corner-sharing octahedra tilt angles range from 54–55°. There are a spread of Bi–O bond distances ranging from 2.35–2.48 Å. In the second Bi3+ site, Bi3+ is bonded to six O2- atoms to form distorted BiO6 octahedra that share corners with two equivalent TbO6 octahedra, corners with four equivalent BiO6 octahedra, edges with two equivalent TbO6 octahedra, and edges with four equivalent BiO6 octahedra. The corner-sharing octahedra tilt angles range from 53–57°. There are a spread of Bi–O bond distances ranging from 2.36–2.47 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to one Tb3+ and three Bi3+ atoms to form a mixture of distorted edge and corner-sharing OTbBi3 trigonal pyramids. In the second O2- site, O2- is bonded to one Tb3+ and three Bi3+ atoms to form a mixture of distorted edge and corner-sharing OTbBi3 trigonal pyramids.