Materials Data on Mg2Si3 by Materials Project

Abstract

Mg2Si3 is Magnesium tetraboride-like structured and 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 4-coordinate geometry to four Si+1.33- atoms. There are a spread of Mg–Si bond distances ranging from 2.65–2.91 Å. In the second Mg2+ site, Mg2+ is bonded in a 6-coordinate geometry to six Si+1.33- atoms. There are a spread of Mg–Si bond distances ranging from 2.65–3.14 Å. In the third 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 2.68–3.15 Å. In the fourth 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. In the fifth Mg2+ site, Mg2+ is bonded in a 6-coordinate geometry to six Si+1.33- atoms. There are a spread of Mg–Si bond distances ranging from 2.68–3.01 Å. In the sixth Mg2+ site, Mg2+ is bonded in a 4-coordinate geometry to four Si+1.33- atoms. There are a spread of Mg–Si bond distances ranging from 2.71–2.85 Å. In the seventh Mg2+ site, Mg2+ is bonded in a 6-coordinate geometry to six Si+1.33- atoms. There are a spread of Mg–Si bond distances ranging from 2.80–3.02 Å. In the eighth 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 2.59–2.99 Å. There are twelve inequivalent Si+1.33- sites. In the first Si+1.33- site, Si+1.33- is bonded in a 1-coordinate geometry to five Mg2+ and four Si+1.33- atoms. There are a spread of Si–Si bond distances ranging from 2.45–2.81 Å. In the second Si+1.33- site, Si+1.33- is bonded in a 1-coordinate geometry to four Mg2+ and four Si+1.33- atoms. There are two shorter (2.47 Å) and one longer (2.62 Å) Si–Si bond lengths. In the third Si+1.33- site, Si+1.33- is bonded in a 1-coordinate geometry to four Mg2+ and two Si+1.33- atoms. The Si–Si bond length is 2.40 Å. In the fourth Si+1.33- site, Si+1.33- is bonded in a 6-coordinate geometry to four Mg2+ and two Si+1.33- atoms. The Si–Si bond length is 2.46 Å. In the fifth Si+1.33- site, Si+1.33- is bonded in a 1-coordinate geometry to five Mg2+ and two Si+1.33- atoms. There are one shorter (2.48 Å) and one longer (2.56 Å) Si–Si bond lengths. In the sixth Si+1.33- site, Si+1.33- is bonded in a 7-coordinate geometry to four Mg2+ and three Si+1.33- atoms. There are a spread of Si–Si bond distances ranging from 2.50–2.63 Å. In the seventh Si+1.33- site, Si+1.33- is bonded in a 7-coordinate geometry to three Mg2+ and four Si+1.33- atoms. There are two shorter (2.49 Å) and one longer (2.55 Å) Si–Si bond lengths. In the eighth Si+1.33- site, Si+1.33- is bonded in a 1-coordinate geometry to four Mg2+ and five Si+1.33- atoms. There are one shorter (2.62 Å) and one longer (2.64 Å) Si–Si bond lengths. In the ninth Si+1.33- site, Si+1.33- is bonded in a 8-coordinate geometry to five Mg2+ and three Si+1.33- atoms. In the tenth Si+1.33- site, Si+1.33- is bonded in a 2-coordinate geometry to three Mg2+ and three Si+1.33- atoms. In the eleventh Si+1.33- site, Si+1.33- is bonded in a 6-coordinate geometry to four Mg2+ and three Si+1.33- atoms. In the twelfth Si+1.33- site, Si+1.33- is bonded in a 7-coordinate geometry to four Mg2+ and three Si+1.33- atoms.