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Title: Materials Data on Sr3Ta4(O6F)2 by Materials Project

Abstract

Sr3Ta4(O6F)2 crystallizes in the trigonal R-3m space group. The structure is three-dimensional. Sr2+ is bonded to six O2- and two equivalent F1- atoms to form distorted SrO6F2 hexagonal bipyramids that share edges with four equivalent SrO6F2 hexagonal bipyramids and edges with six TaO6 octahedra. There are two shorter (2.70 Å) and four longer (2.73 Å) Sr–O bond lengths. Both Sr–F bond lengths are 2.33 Å. There are two inequivalent Ta5+ sites. In the first Ta5+ site, Ta5+ is bonded to six O2- atoms to form TaO6 octahedra that share corners with six TaO6 octahedra and edges with four equivalent SrO6F2 hexagonal bipyramids. The corner-sharing octahedra tilt angles range from 37–42°. All Ta–O bond lengths are 2.01 Å. In the second Ta5+ site, Ta5+ is bonded to six equivalent O2- atoms to form TaO6 octahedra that share corners with six equivalent TaO6 octahedra and edges with six equivalent SrO6F2 hexagonal bipyramids. The corner-sharing octahedral tilt angles are 42°. All Ta–O bond lengths are 2.00 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Sr2+ and two Ta5+ atoms. In the second O2- site, O2- is bonded in amore » 2-coordinate geometry to one Sr2+ and two equivalent Ta5+ atoms. F1- is bonded in a trigonal non-coplanar geometry to three equivalent Sr2+ atoms.« less

Publication Date:
Other Number(s):
mp-756810
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; Sr3Ta4(O6F)2; F-O-Sr-Ta
OSTI Identifier:
1290632
DOI:
https://doi.org/10.17188/1290632

Citation Formats

The Materials Project. Materials Data on Sr3Ta4(O6F)2 by Materials Project. United States: N. p., 2020. Web. doi:10.17188/1290632.
The Materials Project. Materials Data on Sr3Ta4(O6F)2 by Materials Project. United States. doi:https://doi.org/10.17188/1290632
The Materials Project. 2020. "Materials Data on Sr3Ta4(O6F)2 by Materials Project". United States. doi:https://doi.org/10.17188/1290632. https://www.osti.gov/servlets/purl/1290632. Pub date:Fri May 01 00:00:00 EDT 2020
@article{osti_1290632,
title = {Materials Data on Sr3Ta4(O6F)2 by Materials Project},
author = {The Materials Project},
abstractNote = {Sr3Ta4(O6F)2 crystallizes in the trigonal R-3m space group. The structure is three-dimensional. Sr2+ is bonded to six O2- and two equivalent F1- atoms to form distorted SrO6F2 hexagonal bipyramids that share edges with four equivalent SrO6F2 hexagonal bipyramids and edges with six TaO6 octahedra. There are two shorter (2.70 Å) and four longer (2.73 Å) Sr–O bond lengths. Both Sr–F bond lengths are 2.33 Å. There are two inequivalent Ta5+ sites. In the first Ta5+ site, Ta5+ is bonded to six O2- atoms to form TaO6 octahedra that share corners with six TaO6 octahedra and edges with four equivalent SrO6F2 hexagonal bipyramids. The corner-sharing octahedra tilt angles range from 37–42°. All Ta–O bond lengths are 2.01 Å. In the second Ta5+ site, Ta5+ is bonded to six equivalent O2- atoms to form TaO6 octahedra that share corners with six equivalent TaO6 octahedra and edges with six equivalent SrO6F2 hexagonal bipyramids. The corner-sharing octahedral tilt angles are 42°. All Ta–O bond lengths are 2.00 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Sr2+ and two Ta5+ atoms. In the second O2- site, O2- is bonded in a 2-coordinate geometry to one Sr2+ and two equivalent Ta5+ atoms. F1- is bonded in a trigonal non-coplanar geometry to three equivalent Sr2+ atoms.},
doi = {10.17188/1290632},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2020},
month = {5}
}