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Title: Materials Data on Sc5(Si5Ir2)2 by Materials Project

Abstract

Sc5Ir4Si10 crystallizes in the tetragonal P4/mbm space group. The structure is three-dimensional. there are three inequivalent Sc+2.40+ sites. In the first Sc+2.40+ site, Sc+2.40+ is bonded to twelve Si+2.40- atoms to form distorted ScSi12 cuboctahedra that share corners with eight equivalent IrSi5 trigonal bipyramids, edges with eight equivalent ScSi8 hexagonal bipyramids, faces with two equivalent ScSi12 cuboctahedra, and faces with four equivalent IrSi5 trigonal bipyramids. There are eight shorter (2.77 Å) and four longer (3.22 Å) Sc–Si bond lengths. In the second Sc+2.40+ site, Sc+2.40+ is bonded to eight Si+2.40- atoms to form distorted ScSi8 hexagonal bipyramids that share corners with four equivalent IrSi5 trigonal bipyramids, edges with four equivalent ScSi12 cuboctahedra, faces with two equivalent ScSi8 hexagonal bipyramids, and faces with four equivalent IrSi5 trigonal bipyramids. There are a spread of Sc–Si bond distances ranging from 2.80–3.02 Å. In the third Sc+2.40+ site, Sc+2.40+ is bonded in a 10-coordinate geometry to ten Si+2.40- atoms. There are a spread of Sc–Si bond distances ranging from 3.10–3.24 Å. Ir3+ is bonded to five Si+2.40- atoms to form distorted IrSi5 trigonal bipyramids that share corners with two equivalent ScSi12 cuboctahedra, corners with two equivalent ScSi8 hexagonal bipyramids, corners with five equivalent IrSi5more » trigonal bipyramids, a faceface with one ScSi12 cuboctahedra, and faces with two equivalent ScSi8 hexagonal bipyramids. There are a spread of Ir–Si bond distances ranging from 2.37–2.45 Å. There are three inequivalent Si+2.40- sites. In the first Si+2.40- site, Si+2.40- is bonded in a 2-coordinate geometry to six Sc+2.40+, two equivalent Ir3+, and one Si+2.40- atom. The Si–Si bond length is 2.30 Å. In the second Si+2.40- site, Si+2.40- is bonded in a 2-coordinate geometry to five Sc+2.40+ and two equivalent Ir3+ atoms. In the third Si+2.40- site, Si+2.40- is bonded in a 2-coordinate geometry to four Sc+2.40+, two equivalent Ir3+, and two equivalent Si+2.40- atoms. Both Si–Si bond lengths are 2.66 Å.« less

Authors:
Publication Date:
Other Number(s):
mp-1195748
DOE Contract Number:  
AC02-05CH11231; EDCBEE
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). LBNL Materials Project
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Collaborations:
MIT; UC Berkeley; Duke; U Louvain
Subject:
36 MATERIALS SCIENCE
Keywords:
crystal structure; Sc5(Si5Ir2)2; Ir-Sc-Si
OSTI Identifier:
1732527
DOI:
https://doi.org/10.17188/1732527

Citation Formats

The Materials Project. Materials Data on Sc5(Si5Ir2)2 by Materials Project. United States: N. p., 2020. Web. doi:10.17188/1732527.
The Materials Project. Materials Data on Sc5(Si5Ir2)2 by Materials Project. United States. doi:https://doi.org/10.17188/1732527
The Materials Project. 2020. "Materials Data on Sc5(Si5Ir2)2 by Materials Project". United States. doi:https://doi.org/10.17188/1732527. https://www.osti.gov/servlets/purl/1732527. Pub date:Sun May 03 00:00:00 EDT 2020
@article{osti_1732527,
title = {Materials Data on Sc5(Si5Ir2)2 by Materials Project},
author = {The Materials Project},
abstractNote = {Sc5Ir4Si10 crystallizes in the tetragonal P4/mbm space group. The structure is three-dimensional. there are three inequivalent Sc+2.40+ sites. In the first Sc+2.40+ site, Sc+2.40+ is bonded to twelve Si+2.40- atoms to form distorted ScSi12 cuboctahedra that share corners with eight equivalent IrSi5 trigonal bipyramids, edges with eight equivalent ScSi8 hexagonal bipyramids, faces with two equivalent ScSi12 cuboctahedra, and faces with four equivalent IrSi5 trigonal bipyramids. There are eight shorter (2.77 Å) and four longer (3.22 Å) Sc–Si bond lengths. In the second Sc+2.40+ site, Sc+2.40+ is bonded to eight Si+2.40- atoms to form distorted ScSi8 hexagonal bipyramids that share corners with four equivalent IrSi5 trigonal bipyramids, edges with four equivalent ScSi12 cuboctahedra, faces with two equivalent ScSi8 hexagonal bipyramids, and faces with four equivalent IrSi5 trigonal bipyramids. There are a spread of Sc–Si bond distances ranging from 2.80–3.02 Å. In the third Sc+2.40+ site, Sc+2.40+ is bonded in a 10-coordinate geometry to ten Si+2.40- atoms. There are a spread of Sc–Si bond distances ranging from 3.10–3.24 Å. Ir3+ is bonded to five Si+2.40- atoms to form distorted IrSi5 trigonal bipyramids that share corners with two equivalent ScSi12 cuboctahedra, corners with two equivalent ScSi8 hexagonal bipyramids, corners with five equivalent IrSi5 trigonal bipyramids, a faceface with one ScSi12 cuboctahedra, and faces with two equivalent ScSi8 hexagonal bipyramids. There are a spread of Ir–Si bond distances ranging from 2.37–2.45 Å. There are three inequivalent Si+2.40- sites. In the first Si+2.40- site, Si+2.40- is bonded in a 2-coordinate geometry to six Sc+2.40+, two equivalent Ir3+, and one Si+2.40- atom. The Si–Si bond length is 2.30 Å. In the second Si+2.40- site, Si+2.40- is bonded in a 2-coordinate geometry to five Sc+2.40+ and two equivalent Ir3+ atoms. In the third Si+2.40- site, Si+2.40- is bonded in a 2-coordinate geometry to four Sc+2.40+, two equivalent Ir3+, and two equivalent Si+2.40- atoms. Both Si–Si bond lengths are 2.66 Å.},
doi = {10.17188/1732527},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2020},
month = {5}
}