Materials Data on Tm2Zn17 by Materials Project
Tm2Zn17 crystallizes in the trigonal R-3m space group. The structure is three-dimensional. Tm is bonded in a 10-coordinate geometry to nineteen Zn atoms. There are a spread of Tm–Zn bond distances ranging from 3.09–3.45 Å. There are four inequivalent Zn sites. In the first Zn site, Zn is bonded to three equivalent Tm and nine Zn atoms to form distorted ZnTm3Zn9 cuboctahedra that share corners with twenty-three ZnTm2Zn10 cuboctahedra, edges with ten ZnTm2Zn10 cuboctahedra, and faces with twenty ZnTm3Zn9 cuboctahedra. There are a spread of Zn–Zn bond distances ranging from 2.53–2.86 Å. In the second Zn site, Zn is bonded in a 2-coordinate geometry to one Tm and thirteen Zn atoms. There are a spread of Zn–Zn bond distances ranging from 2.65–2.98 Å. In the third Zn site, Zn is bonded to two equivalent Tm and ten Zn atoms to form ZnTm2Zn10 cuboctahedra that share corners with twenty-two ZnTm2Zn10 cuboctahedra, edges with ten ZnTm2Zn10 cuboctahedra, and faces with eighteen ZnTm3Zn9 cuboctahedra. All Zn–Zn bond lengths are 2.59 Å. In the fourth Zn site, Zn is bonded to two equivalent Tm and ten Zn atoms to form distorted ZnTm2Zn10 cuboctahedra that share corners with twenty-four ZnTm2Zn10 cuboctahedra, edges with five ZnTm2Zn10 cuboctahedra, and faces with twenty-one ZnTm3Zn9 cuboctahedra. Both Zn–Zn bond lengths are 2.67 Å.