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Title: Materials Data on BaSrTa2O7 by Materials Project

Abstract

BaSrTa2O7 crystallizes in the orthorhombic Immm space group. The structure is three-dimensional. Ba2+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Ba–O bond distances ranging from 2.74–3.07 Å. There are two inequivalent Sr2+ sites. In the first Sr2+ site, Sr2+ is bonded to twelve O2- atoms to form distorted SrO12 cuboctahedra that share corners with four equivalent SrO12 cuboctahedra, faces with four SrO12 cuboctahedra, and faces with eight equivalent TaO6 octahedra. There are a spread of Sr–O bond distances ranging from 2.62–3.07 Å. In the second Sr2+ site, Sr2+ is bonded to twelve O2- atoms to form distorted SrO12 cuboctahedra that share corners with four equivalent SrO12 cuboctahedra, faces with four SrO12 cuboctahedra, and faces with eight equivalent TaO6 octahedra. There are a spread of Sr–O bond distances ranging from 2.59–3.04 Å. Ta5+ is bonded to six O2- atoms to form TaO6 octahedra that share corners with five equivalent TaO6 octahedra and faces with four SrO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 12–27°. There are a spread of Ta–O bond distances ranging from 1.88–2.13 Å. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded in amore » 4-coordinate geometry to two equivalent Sr2+ and two equivalent Ta5+ atoms. In the second O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to two Sr2+ and two equivalent Ta5+ atoms. In the third O2- site, O2- is bonded to three equivalent Ba2+ and one Ta5+ atom to form a mixture of distorted corner and edge-sharing OBa3Ta tetrahedra. In the fourth O2- site, O2- is bonded in a 4-coordinate geometry to four Sr2+ and two equivalent Ta5+ atoms. In the fifth O2- site, O2- is bonded in a distorted linear geometry to one Ba2+, two equivalent Sr2+, and two equivalent Ta5+ atoms.« less

Publication Date:
Other Number(s):
mp-559151
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; BaSrTa2O7; Ba-O-Sr-Ta
OSTI Identifier:
1270701
DOI:
10.17188/1270701

Citation Formats

The Materials Project. Materials Data on BaSrTa2O7 by Materials Project. United States: N. p., 2020. Web. doi:10.17188/1270701.
The Materials Project. Materials Data on BaSrTa2O7 by Materials Project. United States. doi:10.17188/1270701.
The Materials Project. 2020. "Materials Data on BaSrTa2O7 by Materials Project". United States. doi:10.17188/1270701. https://www.osti.gov/servlets/purl/1270701. Pub date:Fri Jul 17 00:00:00 EDT 2020
@article{osti_1270701,
title = {Materials Data on BaSrTa2O7 by Materials Project},
author = {The Materials Project},
abstractNote = {BaSrTa2O7 crystallizes in the orthorhombic Immm space group. The structure is three-dimensional. Ba2+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Ba–O bond distances ranging from 2.74–3.07 Å. There are two inequivalent Sr2+ sites. In the first Sr2+ site, Sr2+ is bonded to twelve O2- atoms to form distorted SrO12 cuboctahedra that share corners with four equivalent SrO12 cuboctahedra, faces with four SrO12 cuboctahedra, and faces with eight equivalent TaO6 octahedra. There are a spread of Sr–O bond distances ranging from 2.62–3.07 Å. In the second Sr2+ site, Sr2+ is bonded to twelve O2- atoms to form distorted SrO12 cuboctahedra that share corners with four equivalent SrO12 cuboctahedra, faces with four SrO12 cuboctahedra, and faces with eight equivalent TaO6 octahedra. There are a spread of Sr–O bond distances ranging from 2.59–3.04 Å. Ta5+ is bonded to six O2- atoms to form TaO6 octahedra that share corners with five equivalent TaO6 octahedra and faces with four SrO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 12–27°. There are a spread of Ta–O bond distances ranging from 1.88–2.13 Å. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Sr2+ and two equivalent Ta5+ atoms. In the second O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to two Sr2+ and two equivalent Ta5+ atoms. In the third O2- site, O2- is bonded to three equivalent Ba2+ and one Ta5+ atom to form a mixture of distorted corner and edge-sharing OBa3Ta tetrahedra. In the fourth O2- site, O2- is bonded in a 4-coordinate geometry to four Sr2+ and two equivalent Ta5+ atoms. In the fifth O2- site, O2- is bonded in a distorted linear geometry to one Ba2+, two equivalent Sr2+, and two equivalent Ta5+ atoms.},
doi = {10.17188/1270701},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2020},
month = {7}
}

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