Materials Data on Mg2Si3 by Materials Project

Abstract

Mg2Si3 is Magnesium tetraboride-like structured and crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are two inequivalent Mg2+ sites. In the first Mg2+ site, Mg2+ is bonded in a 4-coordinate geometry to five Si+1.33- atoms. There are a spread of Mg–Si bond distances ranging from 2.76–3.03 Å. In the second Mg2+ site, Mg2+ is bonded in a 5-coordinate geometry to seven Si+1.33- atoms. There are a spread of Mg–Si bond distances ranging from 2.74–3.19 Å. There are three inequivalent Si+1.33- sites. In the first Si+1.33- site, Si+1.33- is bonded in a 8-coordinate geometry to four Mg2+ and four Si+1.33- atoms. There are a spread of Si–Si bond distances ranging from 2.43–2.56 Å. In the second Si+1.33- site, Si+1.33- is bonded in a 2-coordinate geometry to four Mg2+ and three Si+1.33- atoms. The Si–Si bond length is 2.39 Å. In the third Si+1.33- site, Si+1.33- is bonded in a 7-coordinate geometry to four Mg2+ and three Si+1.33- atoms. The Si–Si bond length is 2.48 Å.