Materials Data on CsEr(TaBr3)6 by Materials Project

Abstract

CsErTa6Br18 crystallizes in the trigonal P-31c space group. The structure is three-dimensional. Cs is bonded in a 12-coordinate geometry to twelve Br atoms. There are six shorter (4.09 Å) and six longer (4.17 Å) Cs–Br bond lengths. Er is bonded in an octahedral geometry to six equivalent Br atoms. All Er–Br bond lengths are 2.83 Å. Ta is bonded in a 5-coordinate geometry to five Br atoms. There are a spread of Ta–Br bond distances ranging from 2.61–3.02 Å. There are three inequivalent Br sites. In the first Br site, Br is bonded in a 3-coordinate geometry to one Cs, one Er, and one Ta atom. In the second Br site, Br is bonded in a 2-coordinate geometry to two equivalent Ta atoms. In the third Br site, Br is bonded in a 3-coordinate geometry to one Cs and two equivalent Ta atoms.