Materials Data on MgSi by Materials Project

Abstract

MgSi crystallizes in the monoclinic P2_1/m space group. The structure is three-dimensional. there are three inequivalent Mg sites. In the first Mg site, Mg is bonded in a 6-coordinate geometry to seven Si atoms. There are a spread of Mg–Si bond distances ranging from 2.71–3.14 Å. In the second Mg site, Mg is bonded in a 7-coordinate geometry to seven Si atoms. There are a spread of Mg–Si bond distances ranging from 2.80–3.05 Å. In the third Mg site, Mg is bonded in a 7-coordinate geometry to seven Si atoms. There are a spread of Mg–Si bond distances ranging from 2.81–3.00 Å. There are three inequivalent Si sites. In the first Si site, Si is bonded in a 10-coordinate geometry to seven Mg and three equivalent Si atoms. There are one shorter (2.53 Å) and two longer (2.58 Å) Si–Si bond lengths. In the second Si site, Si is bonded in a 9-coordinate geometry to seven Mg and two equivalent Si atoms. Both Si–Si bond lengths are 2.60 Å. In the third Si site, Si is bonded in a 10-coordinate geometry to seven Mg and three equivalent Si atoms.