U.S. Department of EnergyOffice of Scientific and Technical Information
Materials Data on Al7Cr(Bi2O9)2 by Materials Project
Abstract
CrAl7(Bi2O9)2 crystallizes in the monoclinic P2 space group. The structure is three-dimensional. Cr3+ is bonded to six O2- atoms to form CrO6 octahedra that share corners with four AlO4 tetrahedra and edges with two equivalent AlO6 octahedra. There are a spread of Cr–O bond distances ranging from 1.98–2.04 Å. There are five inequivalent Al3+ sites. In the first Al3+ site, Al3+ is bonded to six O2- atoms to form AlO6 octahedra that share corners with four AlO4 tetrahedra and edges with two equivalent AlO6 octahedra. There is two shorter (1.89 Å) and four longer (1.97 Å) Al–O bond length. In the second Al3+ site, Al3+ is bonded to six O2- atoms to form AlO6 octahedra that share corners with four AlO4 tetrahedra and edges with two equivalent CrO6 octahedra. There are a spread of Al–O bond distances ranging from 1.87–1.98 Å. In the third Al3+ site, Al3+ is bonded to six O2- atoms to form AlO6 octahedra that share corners with four AlO4 tetrahedra and edges with two equivalent AlO6 octahedra. There are a spread of Al–O bond distances ranging from 1.89–1.96 Å. In the fourth Al3+ site, Al3+ is bonded to four O2- atoms to form AlO4 tetrahedra thatmore »
- Authors:
- Publication Date:
- Other Number(s):
- mp-1228228
- 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; Al7Cr(Bi2O9)2; Al-Bi-Cr-O
- OSTI Identifier:
- 1746262
- DOI:
- https://doi.org/10.17188/1746262
Citation Formats
The Materials Project. Materials Data on Al7Cr(Bi2O9)2 by Materials Project. United States: N. p., 2020.
Web. doi:10.17188/1746262.
The Materials Project. Materials Data on Al7Cr(Bi2O9)2 by Materials Project. United States. doi:https://doi.org/10.17188/1746262
The Materials Project. 2020.
"Materials Data on Al7Cr(Bi2O9)2 by Materials Project". United States. doi:https://doi.org/10.17188/1746262. https://www.osti.gov/servlets/purl/1746262. Pub date:Sun May 03 00:00:00 EDT 2020
@article{osti_1746262,
title = {Materials Data on Al7Cr(Bi2O9)2 by Materials Project},
author = {The Materials Project},
abstractNote = {CrAl7(Bi2O9)2 crystallizes in the monoclinic P2 space group. The structure is three-dimensional. Cr3+ is bonded to six O2- atoms to form CrO6 octahedra that share corners with four AlO4 tetrahedra and edges with two equivalent AlO6 octahedra. There are a spread of Cr–O bond distances ranging from 1.98–2.04 Å. There are five inequivalent Al3+ sites. In the first Al3+ site, Al3+ is bonded to six O2- atoms to form AlO6 octahedra that share corners with four AlO4 tetrahedra and edges with two equivalent AlO6 octahedra. There is two shorter (1.89 Å) and four longer (1.97 Å) Al–O bond length. In the second Al3+ site, Al3+ is bonded to six O2- atoms to form AlO6 octahedra that share corners with four AlO4 tetrahedra and edges with two equivalent CrO6 octahedra. There are a spread of Al–O bond distances ranging from 1.87–1.98 Å. In the third Al3+ site, Al3+ is bonded to six O2- atoms to form AlO6 octahedra that share corners with four AlO4 tetrahedra and edges with two equivalent AlO6 octahedra. There are a spread of Al–O bond distances ranging from 1.89–1.96 Å. In the fourth Al3+ site, Al3+ is bonded to four O2- atoms to form AlO4 tetrahedra that share a cornercorner with one CrO6 octahedra, corners with three AlO6 octahedra, and a cornercorner with one AlO4 tetrahedra. The corner-sharing octahedra tilt angles range from 48–58°. There are a spread of Al–O bond distances ranging from 1.76–1.81 Å. In the fifth Al3+ site, Al3+ is bonded to four O2- atoms to form AlO4 tetrahedra that share a cornercorner with one CrO6 octahedra, corners with three AlO6 octahedra, and a cornercorner with one AlO4 tetrahedra. The corner-sharing octahedra tilt angles range from 45–58°. There are a spread of Al–O bond distances ranging from 1.76–1.81 Å. There are two inequivalent Bi3+ sites. In the first Bi3+ site, Bi3+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Bi–O bond distances ranging from 2.18–2.92 Å. In the second Bi3+ site, Bi3+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Bi–O bond distances ranging from 2.19–2.93 Å. There are ten inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to one Cr3+, one Al3+, and two Bi3+ atoms. In the second O2- site, O2- is bonded in a 3-coordinate geometry to two Al3+ and two Bi3+ atoms. In the third O2- site, O2- is bonded in a 3-coordinate geometry to two Al3+ and two Bi3+ atoms. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to two Al3+ and two Bi3+ atoms. In the fifth O2- site, O2- is bonded in a linear geometry to two equivalent Al3+ atoms. In the sixth O2- site, O2- is bonded in a linear geometry to two equivalent Al3+ atoms. In the seventh O2- site, O2- is bonded in a distorted trigonal planar geometry to three Al3+ atoms. In the eighth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Cr3+ and two Al3+ atoms. In the ninth O2- site, O2- is bonded in a 4-coordinate geometry to two Al3+ and two Bi3+ atoms. In the tenth O2- site, O2- is bonded in a 4-coordinate geometry to one Cr3+, one Al3+, and two Bi3+ atoms.},
doi = {10.17188/1746262},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun May 03 00:00:00 EDT 2020},
month = {Sun May 03 00:00:00 EDT 2020}
}