skip to main content
DOE Data Explorer title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Materials Data on Sr3(SiAs2)2 by Materials Project

Abstract

Sr3(SiAs2)2 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. there are three inequivalent Sr2+ sites. In the first Sr2+ site, Sr2+ is bonded to six As+1.50- atoms to form SrAs6 octahedra that share corners with four SrAs6 octahedra, corners with four equivalent SiSiAs3 tetrahedra, edges with nine SrAs6 octahedra, and edges with two equivalent SiSiAs3 tetrahedra. The corner-sharing octahedra tilt angles range from 4–11°. There are two shorter (3.16 Å) and four longer (3.20 Å) Sr–As bond lengths. In the second Sr2+ site, Sr2+ is bonded to six As+1.50- atoms to form SrAs6 octahedra that share corners with four SrAs6 octahedra, corners with eight equivalent SiSiAs3 tetrahedra, and edges with nine SrAs6 octahedra. The corner-sharing octahedral tilt angles are 4°. There are a spread of Sr–As bond distances ranging from 3.17–3.35 Å. In the third Sr2+ site, Sr2+ is bonded to six As+1.50- atoms to form SrAs6 octahedra that share corners with four SrAs6 octahedra, corners with six equivalent SiSiAs3 tetrahedra, edges with eight SrAs6 octahedra, and edges with two equivalent SiSiAs3 tetrahedra. The corner-sharing octahedra tilt angles range from 4–11°. There are a spread of Sr–As bond distances ranging from 3.13–3.36 Å. Si is bonded tomore » one Si and three As+1.50- atoms to form SiSiAs3 tetrahedra that share corners with three AsSr4Si2 octahedra, corners with nine SrAs6 octahedra, edges with two SrAs6 octahedra, and an edgeedge with one SiSiAs3 tetrahedra. The corner-sharing octahedra tilt angles range from 19–82°. The Si–Si bond length is 2.37 Å. There are one shorter (2.36 Å) and two longer (2.43 Å) Si–As bond lengths. There are two inequivalent As+1.50- sites. In the first As+1.50- site, As+1.50- is bonded to four Sr2+ and two equivalent Si atoms to form distorted AsSr4Si2 octahedra that share corners with eight AsSr4Si2 octahedra, corners with two equivalent SiSiAs3 tetrahedra, and edges with eight AsSr4Si2 octahedra. The corner-sharing octahedra tilt angles range from 4–94°. In the second As+1.50- site, As+1.50- is bonded to five Sr2+ and one Si atom to form AsSr5Si octahedra that share corners with seven AsSr4Si2 octahedra, a cornercorner with one SiSiAs3 tetrahedra, and edges with ten AsSr4Si2 octahedra. The corner-sharing octahedra tilt angles range from 1–90°.« less

Publication Date:
Other Number(s):
mp-11677
DOE Contract Number:  
AC02-05CH11231; EDCBEE
Product Type:
Dataset
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)
Subject:
36 MATERIALS SCIENCE
Keywords:
crystal structure; Sr3(SiAs2)2; As-Si-Sr
OSTI Identifier:
1188144
DOI:
https://doi.org/10.17188/1188144

Citation Formats

The Materials Project. Materials Data on Sr3(SiAs2)2 by Materials Project. United States: N. p., 2020. Web. doi:10.17188/1188144.
The Materials Project. Materials Data on Sr3(SiAs2)2 by Materials Project. United States. doi:https://doi.org/10.17188/1188144
The Materials Project. 2020. "Materials Data on Sr3(SiAs2)2 by Materials Project". United States. doi:https://doi.org/10.17188/1188144. https://www.osti.gov/servlets/purl/1188144. Pub date:Sun May 03 00:00:00 EDT 2020
@article{osti_1188144,
title = {Materials Data on Sr3(SiAs2)2 by Materials Project},
author = {The Materials Project},
abstractNote = {Sr3(SiAs2)2 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. there are three inequivalent Sr2+ sites. In the first Sr2+ site, Sr2+ is bonded to six As+1.50- atoms to form SrAs6 octahedra that share corners with four SrAs6 octahedra, corners with four equivalent SiSiAs3 tetrahedra, edges with nine SrAs6 octahedra, and edges with two equivalent SiSiAs3 tetrahedra. The corner-sharing octahedra tilt angles range from 4–11°. There are two shorter (3.16 Å) and four longer (3.20 Å) Sr–As bond lengths. In the second Sr2+ site, Sr2+ is bonded to six As+1.50- atoms to form SrAs6 octahedra that share corners with four SrAs6 octahedra, corners with eight equivalent SiSiAs3 tetrahedra, and edges with nine SrAs6 octahedra. The corner-sharing octahedral tilt angles are 4°. There are a spread of Sr–As bond distances ranging from 3.17–3.35 Å. In the third Sr2+ site, Sr2+ is bonded to six As+1.50- atoms to form SrAs6 octahedra that share corners with four SrAs6 octahedra, corners with six equivalent SiSiAs3 tetrahedra, edges with eight SrAs6 octahedra, and edges with two equivalent SiSiAs3 tetrahedra. The corner-sharing octahedra tilt angles range from 4–11°. There are a spread of Sr–As bond distances ranging from 3.13–3.36 Å. Si is bonded to one Si and three As+1.50- atoms to form SiSiAs3 tetrahedra that share corners with three AsSr4Si2 octahedra, corners with nine SrAs6 octahedra, edges with two SrAs6 octahedra, and an edgeedge with one SiSiAs3 tetrahedra. The corner-sharing octahedra tilt angles range from 19–82°. The Si–Si bond length is 2.37 Å. There are one shorter (2.36 Å) and two longer (2.43 Å) Si–As bond lengths. There are two inequivalent As+1.50- sites. In the first As+1.50- site, As+1.50- is bonded to four Sr2+ and two equivalent Si atoms to form distorted AsSr4Si2 octahedra that share corners with eight AsSr4Si2 octahedra, corners with two equivalent SiSiAs3 tetrahedra, and edges with eight AsSr4Si2 octahedra. The corner-sharing octahedra tilt angles range from 4–94°. In the second As+1.50- site, As+1.50- is bonded to five Sr2+ and one Si atom to form AsSr5Si octahedra that share corners with seven AsSr4Si2 octahedra, a cornercorner with one SiSiAs3 tetrahedra, and edges with ten AsSr4Si2 octahedra. The corner-sharing octahedra tilt angles range from 1–90°.},
doi = {10.17188/1188144},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2020},
month = {5}
}