Materials Data on Tb2Zn17 by Materials Project

Abstract

Tb2Zn17 crystallizes in the trigonal R-3m space group. The structure is three-dimensional. Tb is bonded in a 10-coordinate geometry to nineteen Zn atoms. There are a spread of Tb–Zn bond distances ranging from 3.10–3.46 Å. There are four inequivalent Zn sites. In the first Zn site, Zn is bonded to three equivalent Tb and nine Zn atoms to form distorted ZnTb3Zn9 cuboctahedra that share corners with fifteen ZnTb2Zn10 cuboctahedra, edges with eight ZnTb3Zn9 cuboctahedra, and faces with ten ZnTb3Zn9 cuboctahedra. There are a spread of Zn–Zn bond distances ranging from 2.55–2.86 Å. In the second Zn site, Zn is bonded in a 12-coordinate geometry to two equivalent Tb and ten Zn atoms. There are a spread of Zn–Zn bond distances ranging from 2.59–2.97 Å. In the third Zn site, Zn is bonded in a 2-coordinate geometry to one Tb and thirteen Zn atoms. There are one shorter (2.65 Å) and three longer (2.74 Å) Zn–Zn bond lengths. In the fourth Zn site, Zn is bonded to two equivalent Tb and ten Zn atoms to form ZnTb2Zn10 cuboctahedra that share corners with fourteen ZnTb2Zn10 cuboctahedra, edges with six equivalent ZnTb3Zn9 cuboctahedra, and faces with ten ZnTb3Zn9 cuboctahedra.