DOI: 10.17188/1715183
title: Materials Data on Mg6Si5 by Materials Project

description: Mg6Si5 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are twelve inequivalent Mg2+ sites. In the first Mg2+ site, Mg2+ is bonded in a trigonal planar geometry to three Si+2.40- atoms. There are a spread of Mg–Si bond distances ranging from 2.64–2.75 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 2.77–2.86 Å. In the third 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 2.77–3.19 Å. In the fourth 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 2.82–3.11 Å. In the fifth Mg2+ site, Mg2+ is bonded in a 2-coordinate geometry to three Si+2.40- atoms. There are a spread of Mg–Si bond distances ranging from 2.62–3.03 Å. In the sixth 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 2.83–3.01 Å. In the seventh Mg2+ site, Mg2+ is bonded in a 7-coordinate geometry to seven Si+2.40- atoms. There are a spread of Mg–Si bond distances ranging from 2.90–3.12 Å. In the eighth Mg2+ site, Mg2+ is bonded in a 5-coordinate geometry to six Si+2.40- atoms. There are a spread of Mg–Si bond distances ranging from 2.60–3.20 Å. In the ninth Mg2+ site, Mg2+ is bonded in a distorted trigonal non-coplanar geometry to three Si+2.40- atoms. There are a spread of Mg–Si bond distances ranging from 2.69–2.79 Å. In the tenth Mg2+ site, Mg2+ is bonded in a 1-coordinate geometry to five Si+2.40- atoms. There are a spread of Mg–Si bond distances ranging from 2.99–3.24 Å. In the eleventh Mg2+ site, Mg2+ is bonded in a trigonal non-coplanar geometry to three Si+2.40- atoms. There are a spread of Mg–Si bond distances ranging from 2.70–3.03 Å. In the twelfth Mg2+ site, Mg2+ is bonded in a 7-coordinate geometry to seven Si+2.40- atoms. There are a spread of Mg–Si bond distances ranging from 2.75–3.13 Å. There are ten inequivalent Si+2.40- sites. In the first Si+2.40- site, Si+2.40- is bonded in a 8-coordinate geometry to six Mg2+ and two Si+2.40- atoms. There are one shorter (2.43 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 2.38 Å. In the third Si+2.40- site, Si+2.40- is bonded in a 2-coordinate geometry to six Mg2+ and three Si+2.40- atoms. There are a spread of Si–Si bond distances ranging from 2.46–2.55 Å. In the fourth Si+2.40- site, Si+2.40- is bonded in a 9-coordinate geometry to eight Mg2+ and one Si+2.40- atom. The Si–Si bond length is 2.57 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. There are one shorter (2.47 Å) and one longer (2.58 Å) Si–Si bond lengths. In the sixth Si+2.40- site, Si+2.40- is bonded in a 2-coordinate geometry to five Mg2+ and three Si+2.40- atoms. There are a spread of Si–Si bond distances ranging from 2.47–2.51 Å. In the seventh Si+2.40- site, Si+2.40- is bonded in a 1-coordinate geometry to five Mg2+ and three Si+2.40- atoms. In the eighth Si+2.40- site, Si+2.40- is bonded in a 7-coordinate geometry to five Mg2+ and two Si+2.40- atoms. In the ninth Si+2.40- site, Si+2.40- is bonded in a 7-coordinate geometry to five Mg2+ and two Si+2.40- atoms. In the tenth Si+2.40- site, Si+2.40- is bonded in a 7-coordinate geometry to three Mg2+ and four Si+2.40- atoms.