Materials Data on Mg2Si3 by Materials Project

Abstract

Mg2Si3 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are eight inequivalent Mg2+ sites. In the first Mg2+ site, Mg2+ is bonded in a 8-coordinate geometry to eight Si+1.33- atoms. There are a spread of Mg–Si bond distances ranging from 2.79–3.06 Å. In the second Mg2+ site, Mg2+ is bonded in a 9-coordinate geometry to nine Si+1.33- atoms. There are a spread of Mg–Si bond distances ranging from 2.80–3.05 Å. In the third Mg2+ site, Mg2+ is bonded in a 9-coordinate geometry to nine Si+1.33- atoms. There are a spread of Mg–Si bond distances ranging from 2.75–3.02 Å. In the fourth Mg2+ site, Mg2+ is bonded in a 9-coordinate geometry to nine Si+1.33- atoms. There are a spread of Mg–Si bond distances ranging from 2.78–3.02 Å. In the fifth Mg2+ site, Mg2+ is bonded in a 7-coordinate geometry to seven Si+1.33- atoms. There are a spread of Mg–Si bond distances ranging from 2.70–3.08 Å. In the sixth Mg2+ site, Mg2+ is bonded in a 8-coordinate geometry to eight Si+1.33- atoms. There are a spread of Mg–Si bond distances ranging from 2.77–3.10 Å. In the seventh Mg2+ site, Mg2+ is bonded in a 4-coordinate geometry to eight Si+1.33- atoms. There are a spread of Mg–Si bond distances ranging from 2.75–3.16 Å. In the eighth Mg2+ site, Mg2+ is bonded in a 8-coordinate geometry to eight Si+1.33- atoms. There are a spread of Mg–Si bond distances ranging from 2.73–3.12 Å. There are twelve inequivalent Si+1.33- sites. In the first Si+1.33- site, Si+1.33- is bonded in a 9-coordinate geometry to five Mg2+ and four Si+1.33- atoms. There are a spread of Si–Si bond distances ranging from 2.42–2.60 Å. In the second Si+1.33- site, Si+1.33- is bonded in a 9-coordinate geometry to five Mg2+ and four Si+1.33- atoms. There are one shorter (2.41 Å) and two longer (2.52 Å) Si–Si bond lengths. In the third Si+1.33- site, Si+1.33- is bonded in a 9-coordinate geometry to five Mg2+ and four Si+1.33- atoms. There are one shorter (2.44 Å) and one longer (2.49 Å) Si–Si bond lengths. In the fourth Si+1.33- site, Si+1.33- is bonded in a 9-coordinate geometry to five Mg2+ and four Si+1.33- atoms. In the fifth Si+1.33- site, Si+1.33- is bonded in a 9-coordinate geometry to six Mg2+ and three Si+1.33- atoms. There are a spread of Si–Si bond distances ranging from 2.42–2.55 Å. In the sixth Si+1.33- site, Si+1.33- is bonded in a 9-coordinate geometry to seven Mg2+ and two Si+1.33- atoms. There are one shorter (2.38 Å) and one longer (2.41 Å) Si–Si bond lengths. In the seventh Si+1.33- site, Si+1.33- is bonded in a 12-coordinate geometry to three Mg2+ and five Si+1.33- atoms. There are two shorter (2.58 Å) and one longer (2.70 Å) Si–Si bond lengths. In the eighth Si+1.33- site, Si+1.33- is bonded in a 12-coordinate geometry to five Mg2+ and five Si+1.33- atoms. There are a spread of Si–Si bond distances ranging from 2.49–2.67 Å. In the ninth Si+1.33- site, Si+1.33- is bonded in a 4-coordinate geometry to five Mg2+ and four Si+1.33- atoms. In the tenth Si+1.33- site, Si+1.33- is bonded in a 9-coordinate geometry to six Mg2+ and three Si+1.33- atoms. In the eleventh Si+1.33- site, Si+1.33- is bonded in a 9-coordinate geometry to seven Mg2+ and two Si+1.33- atoms. In the twelfth Si+1.33- site, Si+1.33- is bonded in a 9-coordinate geometry to seven Mg2+ and two Si+1.33- atoms.