Materials Data on MgSi by Materials Project

Abstract

MgSi crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are three inequivalent Mg sites. In the first Mg site, Mg is bonded in a 7-coordinate geometry to three equivalent Mg and seven Si atoms. There are one shorter (3.17 Å) and two longer (3.31 Å) Mg–Mg bond lengths. There are a spread of Mg–Si bond distances ranging from 2.80–3.11 Å. In the second Mg site, Mg is bonded in a 12-coordinate geometry to one Mg and eight Si atoms. The Mg–Mg bond length is 2.98 Å. There are a spread of Mg–Si bond distances ranging from 2.82–3.17 Å. In the third Mg site, Mg is bonded in a 12-coordinate geometry to five Mg and seven Si atoms. The Mg–Mg bond length is 3.18 Å. There are a spread of Mg–Si bond distances ranging from 2.80–3.17 Å. There are three inequivalent Si sites. In the first Si site, Si is bonded in a 9-coordinate geometry to seven Mg and two Si atoms. There are one shorter (2.45 Å) and one longer (2.47 Å) Si–Si bond lengths. In the second Si site, Si is bonded in a 10-coordinate geometry to eight Mg and two Si atoms. There are one shorter (2.45 Å) and one longer (2.48 Å) Si–Si bond lengths. In the third Si site, Si is bonded in a 9-coordinate geometry to seven Mg and two Si atoms.