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Title: Materials Data on U2Bi2O7 by Materials Project

Abstract

U2Bi2O7 crystallizes in the orthorhombic Pmma space group. The structure is three-dimensional. there are two inequivalent U4+ sites. In the first U4+ site, U4+ is bonded in a body-centered cubic geometry to eight O2- atoms. There are a spread of U–O bond distances ranging from 2.23–2.36 Å. In the second U4+ site, U4+ is bonded in a body-centered cubic geometry to eight O2- atoms. There are a spread of U–O bond distances ranging from 2.24–2.34 Å. There are two inequivalent Bi3+ sites. In the first Bi3+ site, Bi3+ is bonded in a distorted hexagonal planar geometry to six O2- atoms. There are four shorter (2.43 Å) and two longer (2.56 Å) Bi–O bond lengths. In the second Bi3+ site, Bi3+ is bonded in a distorted hexagonal planar geometry to six O2- atoms. There are two shorter (2.32 Å) and four longer (2.59 Å) Bi–O bond lengths. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded to two equivalent U4+ and two equivalent Bi3+ atoms to form distorted OU2Bi2 tetrahedra that share corners with fourteen OU2Bi2 tetrahedra and edges with five OUBi3 tetrahedra. In the second O2- site, O2- is bonded to one U4+ and threemore » Bi3+ atoms to form a mixture of edge and corner-sharing OUBi3 tetrahedra. In the third O2- site, O2- is bonded to four U4+ atoms to form a mixture of edge and corner-sharing OU4 tetrahedra. In the fourth O2- site, O2- is bonded to three U4+ and one Bi3+ atom to form distorted OU3Bi tetrahedra that share corners with fourteen OU2Bi2 tetrahedra and edges with six OUBi3 tetrahedra. In the fifth O2- site, O2- is bonded to two equivalent U4+ and two equivalent Bi3+ atoms to form distorted OU2Bi2 tetrahedra that share corners with fourteen OUBi3 tetrahedra and edges with five OU4 tetrahedra.« less

Authors:
Publication Date:
Other Number(s):
mp-676230
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; U2Bi2O7; Bi-O-U
OSTI Identifier:
1282967
DOI:
https://doi.org/10.17188/1282967

Citation Formats

The Materials Project. Materials Data on U2Bi2O7 by Materials Project. United States: N. p., 2020. Web. doi:10.17188/1282967.
The Materials Project. Materials Data on U2Bi2O7 by Materials Project. United States. doi:https://doi.org/10.17188/1282967
The Materials Project. 2020. "Materials Data on U2Bi2O7 by Materials Project". United States. doi:https://doi.org/10.17188/1282967. https://www.osti.gov/servlets/purl/1282967. Pub date:Wed Apr 29 00:00:00 EDT 2020
@article{osti_1282967,
title = {Materials Data on U2Bi2O7 by Materials Project},
author = {The Materials Project},
abstractNote = {U2Bi2O7 crystallizes in the orthorhombic Pmma space group. The structure is three-dimensional. there are two inequivalent U4+ sites. In the first U4+ site, U4+ is bonded in a body-centered cubic geometry to eight O2- atoms. There are a spread of U–O bond distances ranging from 2.23–2.36 Å. In the second U4+ site, U4+ is bonded in a body-centered cubic geometry to eight O2- atoms. There are a spread of U–O bond distances ranging from 2.24–2.34 Å. There are two inequivalent Bi3+ sites. In the first Bi3+ site, Bi3+ is bonded in a distorted hexagonal planar geometry to six O2- atoms. There are four shorter (2.43 Å) and two longer (2.56 Å) Bi–O bond lengths. In the second Bi3+ site, Bi3+ is bonded in a distorted hexagonal planar geometry to six O2- atoms. There are two shorter (2.32 Å) and four longer (2.59 Å) Bi–O bond lengths. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded to two equivalent U4+ and two equivalent Bi3+ atoms to form distorted OU2Bi2 tetrahedra that share corners with fourteen OU2Bi2 tetrahedra and edges with five OUBi3 tetrahedra. In the second O2- site, O2- is bonded to one U4+ and three Bi3+ atoms to form a mixture of edge and corner-sharing OUBi3 tetrahedra. In the third O2- site, O2- is bonded to four U4+ atoms to form a mixture of edge and corner-sharing OU4 tetrahedra. In the fourth O2- site, O2- is bonded to three U4+ and one Bi3+ atom to form distorted OU3Bi tetrahedra that share corners with fourteen OU2Bi2 tetrahedra and edges with six OUBi3 tetrahedra. In the fifth O2- site, O2- is bonded to two equivalent U4+ and two equivalent Bi3+ atoms to form distorted OU2Bi2 tetrahedra that share corners with fourteen OUBi3 tetrahedra and edges with five OU4 tetrahedra.},
doi = {10.17188/1282967},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2020},
month = {4}
}