Materials Data on Tm by Materials Project

Abstract

Tm is alpha Samarium structured and crystallizes in the trigonal R-3m space group. The structure is three-dimensional. there are four inequivalent Tm sites. In the first Tm site, Tm is bonded to twelve Tm atoms to form a mixture of edge, corner, and face-sharing TmTm12 cuboctahedra. There are six shorter (3.47 Å) and six longer (3.51 Å) Tm–Tm bond lengths. In the second Tm site, Tm is bonded to twelve Tm atoms to form a mixture of edge, corner, and face-sharing TmTm12 cuboctahedra. There are three shorter (3.45 Å) and six longer (3.51 Å) Tm–Tm bond lengths. In the third Tm site, Tm is bonded to twelve Tm atoms to form a mixture of edge, corner, and face-sharing TmTm12 cuboctahedra. All Tm–Tm bond lengths are 3.51 Å. In the fourth Tm site, Tm is bonded to twelve Tm atoms to form a mixture of edge, corner, and face-sharing TmTm12 cuboctahedra. There are a spread of Tm–Tm bond distances ranging from 3.45–3.51 Å.