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Title: Materials Data on LaTa3O9 by Materials Project

Abstract

LaTa3O9 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. La3+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.47–2.80 Å. There are two inequivalent Ta5+ sites. In the first Ta5+ site, Ta5+ is bonded to seven O2- atoms to form distorted TaO7 pentagonal bipyramids that share a cornercorner with one TaO6 octahedra, corners with two equivalent TaO7 pentagonal bipyramids, an edgeedge with one TaO6 octahedra, and edges with two equivalent TaO7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 35°. There are a spread of Ta–O bond distances ranging from 1.96–2.21 Å. In the second Ta5+ site, Ta5+ is bonded to six O2- atoms to form TaO6 octahedra that share corners with two equivalent TaO6 octahedra, corners with two equivalent TaO7 pentagonal bipyramids, and edges with two equivalent TaO7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 28°. There is two shorter (1.98 Å) and four longer (2.00 Å) Ta–O bond length. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent La3+ and two Ta5+ atoms. In the second O2- site, O2- ismore » bonded in a 3-coordinate geometry to three Ta5+ atoms. In the third O2- site, O2- is bonded in a distorted linear geometry to one La3+ and two equivalent Ta5+ atoms. In the fourth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one La3+ and two equivalent Ta5+ atoms. In the fifth O2- site, O2- is bonded in a 2-coordinate geometry to one La3+ and two equivalent Ta5+ atoms. In the sixth O2- site, O2- is bonded in a 3-coordinate geometry to one La3+ and two equivalent Ta5+ atoms.« less

Publication Date:
Other Number(s):
mp-5308
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; LaTa3O9; La-O-Ta
OSTI Identifier:
1263265
DOI:
https://doi.org/10.17188/1263265

Citation Formats

The Materials Project. Materials Data on LaTa3O9 by Materials Project. United States: N. p., 2020. Web. doi:10.17188/1263265.
The Materials Project. Materials Data on LaTa3O9 by Materials Project. United States. doi:https://doi.org/10.17188/1263265
The Materials Project. 2020. "Materials Data on LaTa3O9 by Materials Project". United States. doi:https://doi.org/10.17188/1263265. https://www.osti.gov/servlets/purl/1263265. Pub date:Thu Apr 30 00:00:00 EDT 2020
@article{osti_1263265,
title = {Materials Data on LaTa3O9 by Materials Project},
author = {The Materials Project},
abstractNote = {LaTa3O9 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. La3+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.47–2.80 Å. There are two inequivalent Ta5+ sites. In the first Ta5+ site, Ta5+ is bonded to seven O2- atoms to form distorted TaO7 pentagonal bipyramids that share a cornercorner with one TaO6 octahedra, corners with two equivalent TaO7 pentagonal bipyramids, an edgeedge with one TaO6 octahedra, and edges with two equivalent TaO7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 35°. There are a spread of Ta–O bond distances ranging from 1.96–2.21 Å. In the second Ta5+ site, Ta5+ is bonded to six O2- atoms to form TaO6 octahedra that share corners with two equivalent TaO6 octahedra, corners with two equivalent TaO7 pentagonal bipyramids, and edges with two equivalent TaO7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 28°. There is two shorter (1.98 Å) and four longer (2.00 Å) Ta–O bond length. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent La3+ and two Ta5+ atoms. In the second O2- site, O2- is bonded in a 3-coordinate geometry to three Ta5+ atoms. In the third O2- site, O2- is bonded in a distorted linear geometry to one La3+ and two equivalent Ta5+ atoms. In the fourth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one La3+ and two equivalent Ta5+ atoms. In the fifth O2- site, O2- is bonded in a 2-coordinate geometry to one La3+ and two equivalent Ta5+ atoms. In the sixth O2- site, O2- is bonded in a 3-coordinate geometry to one La3+ and two equivalent Ta5+ atoms.},
doi = {10.17188/1263265},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2020},
month = {4}
}