Materials Data on Mg4Si3 by Materials Project

Dataset · Mon May 04 04:00:00 EDT 2020

DOI:https://doi.org/10.17188/1745543· OSTI ID:1745543

Mg4Si3 is Magnesium tetraboride-like structured and crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are eight inequivalent Mg sites. In the first Mg site, Mg is bonded in a 6-coordinate geometry to six Si atoms. There are a spread of Mg–Si bond distances ranging from 2.64–3.01 Å. In the second Mg site, Mg is bonded in a 6-coordinate geometry to six Si atoms. There are a spread of Mg–Si bond distances ranging from 2.68–3.06 Å. In the third Mg site, Mg is bonded to four Si atoms to form a mixture of distorted edge and corner-sharing MgSi4 trigonal pyramids. There are a spread of Mg–Si bond distances ranging from 2.74–3.02 Å. In the fourth Mg site, Mg is bonded in a 6-coordinate geometry to six Si atoms. There are a spread of Mg–Si bond distances ranging from 2.72–2.97 Å. In the fifth Mg site, Mg is bonded in a distorted T-shaped geometry to three Si atoms. There are a spread of Mg–Si bond distances ranging from 2.68–2.80 Å. In the sixth Mg site, Mg is bonded to four Si atoms to form a mixture of distorted edge and corner-sharing MgSi4 tetrahedra. There are a spread of Mg–Si bond distances ranging from 2.64–2.75 Å. In the seventh Mg site, Mg is bonded in a 5-coordinate geometry to five Si atoms. There are a spread of Mg–Si bond distances ranging from 2.78–3.03 Å. In the eighth Mg site, Mg is bonded in a 5-coordinate geometry to five Si atoms. There are a spread of Mg–Si bond distances ranging from 2.66–2.90 Å. There are six inequivalent Si sites. In the first Si site, Si is bonded in a 8-coordinate geometry to seven Mg and one Si atom. The Si–Si bond length is 2.42 Å. In the second Si site, Si is bonded in a 8-coordinate geometry to six Mg and two Si atoms. There are one shorter (2.46 Å) and one longer (2.60 Å) Si–Si bond lengths. In the third Si site, Si is bonded in a 8-coordinate geometry to six Mg and two Si atoms. The Si–Si bond length is 2.48 Å. In the fourth Si site, Si is bonded in a 7-coordinate geometry to seven Mg atoms. In the fifth Si site, Si is bonded in a 8-coordinate geometry to six Mg and two Si atoms. In the sixth Si site, Si is bonded in a 8-coordinate geometry to seven Mg and one Si atom.

• Research Organization: LBNL Materials Project; Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
• Contributing Organization: The Materials Project; MIT; UC Berkeley; Duke; U Louvain
• DOE Contract Number: AC02-05CH11231
• OSTI ID: 1745543
• Report Number(s): mp-1074382
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
Mg-Si
Mg4Si3
crystal structure