U.S. Department of EnergyOffice of Scientific and Technical Information
Materials Data on Li2CaTa2O7 by Materials Project
Abstract
Li2CaTa2O7 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Li1+ is bonded in a 4-coordinate geometry to four equivalent O2- atoms. All Li–O bond lengths are 2.09 Å. Ca2+ is bonded to twelve O2- atoms to form CaO12 cuboctahedra that share corners with four equivalent CaO12 cuboctahedra, faces with four equivalent CaO12 cuboctahedra, and faces with eight equivalent TaO6 octahedra. There are eight shorter (2.71 Å) and four longer (2.80 Å) Ca–O bond lengths. Ta5+ is bonded to six O2- atoms to form TaO6 octahedra that share corners with five equivalent TaO6 octahedra and faces with four equivalent CaO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–13°. There are a spread of Ta–O bond distances ranging from 1.91–2.08 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Ca2+ and two equivalent Ta5+ atoms. In the second O2- site, O2- is bonded to four equivalent Li1+ and one Ta5+ atom to form a mixture of distorted edge and corner-sharing OLi4Ta trigonal bipyramids. In the third O2- site, O2- is bonded in a distorted linear geometry to four equivalent Ca2+ and two equivalent Ta5+ atoms.
- Authors:
- Publication Date:
- Other Number(s):
- mp-557861
- 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; Li2CaTa2O7; Ca-Li-O-Ta
- OSTI Identifier:
- 1270051
- DOI:
- https://doi.org/10.17188/1270051
Citation Formats
The Materials Project. Materials Data on Li2CaTa2O7 by Materials Project. United States: N. p., 2020.
Web. doi:10.17188/1270051.
The Materials Project. Materials Data on Li2CaTa2O7 by Materials Project. United States. doi:https://doi.org/10.17188/1270051
The Materials Project. 2020.
"Materials Data on Li2CaTa2O7 by Materials Project". United States. doi:https://doi.org/10.17188/1270051. https://www.osti.gov/servlets/purl/1270051. Pub date:Wed Jul 15 00:00:00 EDT 2020
@article{osti_1270051,
title = {Materials Data on Li2CaTa2O7 by Materials Project},
author = {The Materials Project},
abstractNote = {Li2CaTa2O7 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Li1+ is bonded in a 4-coordinate geometry to four equivalent O2- atoms. All Li–O bond lengths are 2.09 Å. Ca2+ is bonded to twelve O2- atoms to form CaO12 cuboctahedra that share corners with four equivalent CaO12 cuboctahedra, faces with four equivalent CaO12 cuboctahedra, and faces with eight equivalent TaO6 octahedra. There are eight shorter (2.71 Å) and four longer (2.80 Å) Ca–O bond lengths. Ta5+ is bonded to six O2- atoms to form TaO6 octahedra that share corners with five equivalent TaO6 octahedra and faces with four equivalent CaO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–13°. There are a spread of Ta–O bond distances ranging from 1.91–2.08 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Ca2+ and two equivalent Ta5+ atoms. In the second O2- site, O2- is bonded to four equivalent Li1+ and one Ta5+ atom to form a mixture of distorted edge and corner-sharing OLi4Ta trigonal bipyramids. In the third O2- site, O2- is bonded in a distorted linear geometry to four equivalent Ca2+ and two equivalent Ta5+ atoms.},
doi = {10.17188/1270051},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2020},
month = {7}
}