Materials Data on MgSi by Materials Project

Abstract

MgSi crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are six inequivalent Mg sites. In the first Mg site, Mg is bonded in a 3-coordinate geometry to four Mg and seven Si atoms. There are a spread of Mg–Mg bond distances ranging from 2.91–3.05 Å. There are a spread of Mg–Si bond distances ranging from 2.68–3.04 Å. In the second Mg site, Mg is bonded in a 1-coordinate geometry to one Mg and six Si atoms. There are a spread of Mg–Si bond distances ranging from 2.72–3.17 Å. In the third Mg site, Mg is bonded in a 6-coordinate geometry to one Mg and seven Si atoms. The Mg–Mg bond length is 3.31 Å. There are a spread of Mg–Si bond distances ranging from 2.79–3.24 Å. In the fourth Mg site, Mg is bonded in a 4-coordinate geometry to two equivalent Mg and seven Si atoms. There are one shorter (2.88 Å) and one longer (2.92 Å) Mg–Mg bond lengths. There are a spread of Mg–Si bond distances ranging from 2.70–3.13 Å. In the fifth Mg site, Mg is bonded in a 12-coordinate geometry to two Mg and eight Si atoms. The Mg–Mg bond length is 3.21 Å. There are a spread of Mg–Si bond distances ranging from 2.81–3.21 Å. In the sixth Mg site, Mg is bonded in a 12-coordinate geometry to six Mg and six Si atoms. There are a spread of Mg–Si bond distances ranging from 2.73–3.07 Å. There are six inequivalent Si sites. In the first Si site, Si is bonded in a 2-coordinate geometry to six Mg and five Si atoms. There are a spread of Si–Si bond distances ranging from 2.57–2.77 Å. In the second Si site, Si is bonded in a 9-coordinate geometry to eight Mg and one Si atom. The Si–Si bond length is 2.44 Å. In the third Si site, Si is bonded in a 10-coordinate geometry to six Mg and four Si atoms. There are one shorter (2.54 Å) and one longer (2.59 Å) Si–Si bond lengths. In the fourth Si site, Si is bonded in a 9-coordinate geometry to seven Mg and two Si atoms. In the fifth Si site, Si is bonded in a 9-coordinate geometry to six Mg and three Si atoms. In the sixth Si site, Si is bonded in a 9-coordinate geometry to eight Mg and one Si atom.