DOI: 10.17188/1676592
title: Materials Data on Mg2Si3 by Materials Project

description: 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 8-coordinate geometry to eight Si+1.33- atoms. There are a spread of Mg–Si bond distances ranging from 2.73–3.15 Å. In the second 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 2.87–3.07 Å. In the third Mg2+ site, Mg2+ is bonded in a 5-coordinate geometry to five Si+1.33- atoms. There are a spread of Mg–Si bond distances ranging from 2.73–3.05 Å. In the fourth 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 2.73–3.10 Å. In the fifth Mg2+ site, Mg2+ is bonded in a 5-coordinate geometry to five Si+1.33- atoms. There are a spread of Mg–Si bond distances ranging from 2.77–2.93 Å. In the sixth 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 2.75–3.14 Å. In the seventh Mg2+ site, Mg2+ is bonded in a 6-coordinate geometry to seven Si+1.33- atoms. There are a spread of Mg–Si bond distances ranging from 2.80–3.21 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 2.81–3.14 Å. There are twelve inequivalent Si+1.33- sites. In the first Si+1.33- site, Si+1.33- is bonded in a 8-coordinate geometry to five Mg2+ and three Si+1.33- atoms. There are one shorter (2.47 Å) and two longer (2.48 Å) Si–Si bond lengths. In the second Si+1.33- site, Si+1.33- is bonded in a 8-coordinate geometry to five Mg2+ and three Si+1.33- atoms. There are one shorter (2.42 Å) and one longer (2.58 Å) Si–Si bond lengths. In the third Si+1.33- site, Si+1.33- is bonded in a 6-coordinate geometry to two Mg2+ and four Si+1.33- atoms. There are one shorter (2.37 Å) and one longer (2.41 Å) Si–Si bond lengths. In the fourth Si+1.33- site, Si+1.33- is bonded in a 5-coordinate geometry to one Mg2+ and four Si+1.33- atoms. There are one shorter (2.39 Å) and one longer (2.43 Å) Si–Si bond lengths. In the fifth 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 2.57–2.63 Å. In the sixth 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 2.54–2.57 Å. In the seventh 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 2.44–2.77 Å. In the eighth 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 one shorter (2.49 Å) and one longer (2.56 Å) Si–Si bond lengths. In the ninth Si+1.33- site, Si+1.33- is bonded in a distorted hexagonal bipyramidal geometry to four Mg2+ and four Si+1.33- atoms. The Si–Si bond length is 2.64 Å. In the tenth Si+1.33- site, Si+1.33- is bonded in a 7-coordinate geometry to four Mg2+ and three Si+1.33- atoms. In the eleventh Si+1.33- site, Si+1.33- is bonded in a 7-coordinate geometry to five 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 six Mg2+ and three Si+1.33- atoms.