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Title: Materials Data on Eu2Al4O9 by Materials Project

Abstract

Eu2Al4O9 crystallizes in the orthorhombic Pbam space group. The structure is three-dimensional. Eu3+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Eu–O bond distances ranging from 2.25–2.54 Å. There are two inequivalent Al3+ sites. In the first Al3+ site, Al3+ is bonded to six O2- atoms to form AlO6 octahedra that share corners with four equivalent AlO4 tetrahedra and edges with two equivalent AlO6 octahedra. There are a spread of Al–O bond distances ranging from 1.90–1.98 Å. In the second Al3+ site, Al3+ is bonded to four O2- atoms to form AlO4 tetrahedra that share corners with four equivalent AlO6 octahedra and a cornercorner with one AlO4 tetrahedra. The corner-sharing octahedra tilt angles range from 48–56°. There is one shorter (1.73 Å) and three longer (1.78 Å) Al–O bond length. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a linear geometry to two equivalent Al3+ atoms. In the second O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Eu3+ and two Al3+ atoms. In the third O2- site, O2- is bonded in a distorted trigonal planar geometry to three Al3+ atoms. In themore » fourth O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Eu3+ and two equivalent Al3+ atoms.« less

Authors:
Publication Date:
Other Number(s):
mp-771815
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; Eu2Al4O9; Al-Eu-O
OSTI Identifier:
1300867
DOI:
https://doi.org/10.17188/1300867

Citation Formats

The Materials Project. Materials Data on Eu2Al4O9 by Materials Project. United States: N. p., 2020. Web. doi:10.17188/1300867.
The Materials Project. Materials Data on Eu2Al4O9 by Materials Project. United States. doi:https://doi.org/10.17188/1300867
The Materials Project. 2020. "Materials Data on Eu2Al4O9 by Materials Project". United States. doi:https://doi.org/10.17188/1300867. https://www.osti.gov/servlets/purl/1300867. Pub date:Fri Jun 05 00:00:00 EDT 2020
@article{osti_1300867,
title = {Materials Data on Eu2Al4O9 by Materials Project},
author = {The Materials Project},
abstractNote = {Eu2Al4O9 crystallizes in the orthorhombic Pbam space group. The structure is three-dimensional. Eu3+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Eu–O bond distances ranging from 2.25–2.54 Å. There are two inequivalent Al3+ sites. In the first Al3+ site, Al3+ is bonded to six O2- atoms to form AlO6 octahedra that share corners with four equivalent AlO4 tetrahedra and edges with two equivalent AlO6 octahedra. There are a spread of Al–O bond distances ranging from 1.90–1.98 Å. In the second Al3+ site, Al3+ is bonded to four O2- atoms to form AlO4 tetrahedra that share corners with four equivalent AlO6 octahedra and a cornercorner with one AlO4 tetrahedra. The corner-sharing octahedra tilt angles range from 48–56°. There is one shorter (1.73 Å) and three longer (1.78 Å) Al–O bond length. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a linear geometry to two equivalent Al3+ atoms. In the second O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Eu3+ and two Al3+ atoms. In the third O2- site, O2- is bonded in a distorted trigonal planar geometry to three Al3+ atoms. In the fourth O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Eu3+ and two equivalent Al3+ atoms.},
doi = {10.17188/1300867},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2020},
month = {6}
}