DOI: 10.17188/1667010
title: Materials Data on Mg6Si5 by Materials Project

description: Mg6Si5 crystallizes in the monoclinic Pm space group. The structure is three-dimensional. there are twelve inequivalent Mg2+ sites. In the first Mg2+ site, Mg2+ is bonded in a single-bond geometry to one Si+2.40- atom. The Mg–Si bond length is 2.84 Å. In the second Mg2+ site, Mg2+ is bonded in a rectangular see-saw-like geometry to four Si+2.40- atoms. There are a spread of Mg–Si bond distances ranging from 2.65–2.90 Å. In the third Mg2+ site, Mg2+ is bonded in a 8-coordinate geometry to eight Si+2.40- atoms. There are a spread of Mg–Si bond distances ranging from 2.83–3.09 Å. In the fourth Mg2+ site, Mg2+ is bonded in a 6-coordinate geometry to eight Si+2.40- atoms. There are a spread of Mg–Si bond distances ranging from 2.77–3.15 Å. In the fifth Mg2+ site, Mg2+ is bonded in a 5-coordinate geometry to five Si+2.40- atoms. There are a spread of Mg–Si bond distances ranging from 2.87–3.04 Å. In the sixth Mg2+ site, Mg2+ is bonded in a 6-coordinate geometry to six Si+2.40- atoms. There are a spread of Mg–Si bond distances ranging from 2.97–3.14 Å. In the seventh Mg2+ site, Mg2+ is bonded in a 8-coordinate geometry to eight Si+2.40- atoms. There are a spread of Mg–Si bond distances ranging from 2.90–2.98 Å. In the eighth Mg2+ site, Mg2+ is bonded in a 8-coordinate geometry to eight Si+2.40- atoms. There are a spread of Mg–Si bond distances ranging from 2.76–3.03 Å. In the ninth Mg2+ site, Mg2+ is bonded in a distorted T-shaped geometry to three Si+2.40- atoms. There are two shorter (2.83 Å) and one longer (2.91 Å) Mg–Si bond lengths. In the tenth Mg2+ site, Mg2+ is bonded in a 4-coordinate geometry to five Si+2.40- atoms. There are a spread of Mg–Si bond distances ranging from 2.80–3.09 Å. In the eleventh Mg2+ site, Mg2+ is bonded in a linear geometry to two Si+2.40- atoms. There are one shorter (2.72 Å) and one longer (2.83 Å) Mg–Si bond lengths. In the twelfth Mg2+ site, Mg2+ is bonded in a 4-coordinate geometry to four Si+2.40- atoms. There are a spread of Mg–Si bond distances ranging from 2.91–3.11 Å. There are ten inequivalent Si+2.40- sites. In the first Si+2.40- site, Si+2.40- is bonded in a 9-coordinate geometry to seven Mg2+ and two Si+2.40- atoms. There are one shorter (2.37 Å) and one longer (2.46 Å) Si–Si bond lengths. In the second Si+2.40- site, Si+2.40- is bonded in a 9-coordinate geometry to seven Mg2+ and two Si+2.40- atoms. The Si–Si bond length is 2.40 Å. In the third Si+2.40- site, Si+2.40- is bonded in a 9-coordinate geometry to six Mg2+ and three Si+2.40- atoms. There are two shorter (2.47 Å) and one longer (2.70 Å) Si–Si bond lengths. In the fourth Si+2.40- site, Si+2.40- is bonded in a 8-coordinate geometry to four Mg2+ and four Si+2.40- atoms. There are a spread of Si–Si bond distances ranging from 2.37–2.63 Å. In the fifth Si+2.40- site, Si+2.40- is bonded in a 9-coordinate geometry to seven Mg2+ and two Si+2.40- atoms. The Si–Si bond length is 2.59 Å. In the sixth Si+2.40- site, Si+2.40- is bonded in a 9-coordinate geometry to six Mg2+ and three Si+2.40- atoms. There are one shorter (2.53 Å) and two longer (2.54 Å) Si–Si bond lengths. In the seventh Si+2.40- site, Si+2.40- is bonded in a 9-coordinate geometry to six Mg2+ and three Si+2.40- atoms. In the eighth Si+2.40- site, Si+2.40- is bonded in a 10-coordinate geometry to seven Mg2+ and three Si+2.40- atoms. In the ninth Si+2.40- site, Si+2.40- is bonded in a 8-coordinate geometry to six Mg2+ and two equivalent Si+2.40- atoms. In the tenth Si+2.40- site, Si+2.40- is bonded in a 10-coordinate geometry to six Mg2+ and four Si+2.40- atoms.