Materials Data on K2TbO3 by Materials Project

Abstract

K2TbO3 crystallizes in the orthorhombic Cmc2_1 space group. The structure is three-dimensional. K1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of K–O bond distances ranging from 2.66–3.08 Å. Tb4+ is bonded to five O2- atoms to form distorted edge-sharing TbO5 trigonal bipyramids. There are a spread of Tb–O bond distances ranging from 2.14–2.27 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 6-coordinate geometry to four equivalent K1+ and two equivalent Tb4+ atoms. In the second O2- site, O2- is bonded in a 5-coordinate geometry to four equivalent K1+ and one Tb4+ atom.