Materials Data on Tm2Mg by Materials Project

Abstract

Tm2Mg crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. Mg is bonded in a 8-coordinate geometry to eight Tm atoms. There are a spread of Mg–Tm bond distances ranging from 3.28–3.33 Å. There are two inequivalent Tm sites. In the first Tm site, Tm is bonded to six equivalent Mg and six Tm atoms to form a mixture of distorted edge, face, and corner-sharing TmTm6Mg6 cuboctahedra. There are a spread of Tm–Tm bond distances ranging from 3.49–3.58 Å. In the second Tm site, Tm is bonded to two equivalent Mg and ten Tm atoms to form a mixture of distorted edge, face, and corner-sharing TmTm10Mg2 cuboctahedra. There are four shorter (3.35 Å) and two longer (3.58 Å) Tm–Tm bond lengths.