Materials Data on SrMg2 by Materials Project

Abstract

Mg2Sr crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. Sr is bonded to four equivalent Sr and eight Mg atoms to form a mixture of distorted corner and face-sharing SrSr4Mg8 cuboctahedra. There are two shorter (3.76 Å) and two longer (3.77 Å) Sr–Sr bond lengths. There are a spread of Sr–Mg bond distances ranging from 3.53–4.03 Å. There are two inequivalent Mg sites. In the first Mg site, Mg is bonded in a 10-coordinate geometry to six equivalent Sr and four equivalent Mg atoms. There are two shorter (3.15 Å) and two longer (3.42 Å) Mg–Mg bond lengths. In the second Mg site, Mg is bonded in a 10-coordinate geometry to two equivalent Sr and eight Mg atoms. All Mg–Mg bond lengths are 3.42 Å.