Local structure and oxidation state of uranium in some ternary oxides: X-ray absorption analysis

Research output: Contribution to journalArticlepeer-review

Standard

Local structure and oxidation state of uranium in some ternary oxides: X-ray absorption analysis. / Soldatov, A.V.; Lamoen, D.; Konstantinovic, Milan; Van den Berghe, Sven; Scheinost, A.C.; Verwerft, Marc; Leenaers, Ann (Peer reviewer).

In: Journal of Solid State Chemistry, Vol. 180, No. 1, 01.2007, p. 54-61.

Research output: Contribution to journalArticlepeer-review

Author

Soldatov, A.V. ; Lamoen, D. ; Konstantinovic, Milan ; Van den Berghe, Sven ; Scheinost, A.C. ; Verwerft, Marc ; Leenaers, Ann. / Local structure and oxidation state of uranium in some ternary oxides: X-ray absorption analysis. In: Journal of Solid State Chemistry. 2007 ; Vol. 180, No. 1. pp. 54-61.

Bibtex - Download

@article{9b20547787ed40f38dd5391ed1eaabd5,
title = "Local structure and oxidation state of uranium in some ternary oxides: X-ray absorption analysis",
abstract = "We investigated the local atomic and electronic structures of two related systematic sets of ternary uranium oxid,es, NaUO3,KUO3,RbUO3 and BaUO3,,Ba2U2O7, BaUO4, by measuring the X-ray absorption near edge structure (XANES). The results are compared with calculations based on a self-consistent real space full multiple scattering analysis. We found a very good agreement between measured and calculated spectra, which indicates that the uranium ions are in a pure U5+ oxidation state in these compounds. The low energy shoulder observed in the U L3 edge XANES is an intrinsic feature of the uranium unoccupied 6d electronic states of the U5+ ions within the studied materials. Specific double shoulder features in the higher energy range of the U L3 edge XANES can be interpreted as indicative of the pure cubic perovskite structure.",
keywords = "X-ray absorption fine structure, Local and electronic structure, Uranium oxides",
author = "A.V. Soldatov and D. Lamoen and Milan Konstantinovic and {Van den Berghe}, Sven and A.C. Scheinost and Marc Verwerft and Ann Leenaers",
note = "Score = 10",
year = "2007",
month = jan,
doi = "10.1016/j.jssc.2006.08.038",
language = "English",
volume = "180",
pages = "54--61",
journal = "Journal of Solid State Chemistry",
issn = "0022-4596",
publisher = "Elsevier",
number = "1",

}

RIS - Download

TY - JOUR

T1 - Local structure and oxidation state of uranium in some ternary oxides: X-ray absorption analysis

AU - Soldatov, A.V.

AU - Lamoen, D.

AU - Konstantinovic, Milan

AU - Van den Berghe, Sven

AU - Scheinost, A.C.

AU - Verwerft, Marc

A2 - Leenaers, Ann

N1 - Score = 10

PY - 2007/1

Y1 - 2007/1

N2 - We investigated the local atomic and electronic structures of two related systematic sets of ternary uranium oxid,es, NaUO3,KUO3,RbUO3 and BaUO3,,Ba2U2O7, BaUO4, by measuring the X-ray absorption near edge structure (XANES). The results are compared with calculations based on a self-consistent real space full multiple scattering analysis. We found a very good agreement between measured and calculated spectra, which indicates that the uranium ions are in a pure U5+ oxidation state in these compounds. The low energy shoulder observed in the U L3 edge XANES is an intrinsic feature of the uranium unoccupied 6d electronic states of the U5+ ions within the studied materials. Specific double shoulder features in the higher energy range of the U L3 edge XANES can be interpreted as indicative of the pure cubic perovskite structure.

AB - We investigated the local atomic and electronic structures of two related systematic sets of ternary uranium oxid,es, NaUO3,KUO3,RbUO3 and BaUO3,,Ba2U2O7, BaUO4, by measuring the X-ray absorption near edge structure (XANES). The results are compared with calculations based on a self-consistent real space full multiple scattering analysis. We found a very good agreement between measured and calculated spectra, which indicates that the uranium ions are in a pure U5+ oxidation state in these compounds. The low energy shoulder observed in the U L3 edge XANES is an intrinsic feature of the uranium unoccupied 6d electronic states of the U5+ ions within the studied materials. Specific double shoulder features in the higher energy range of the U L3 edge XANES can be interpreted as indicative of the pure cubic perovskite structure.

KW - X-ray absorption fine structure

KW - Local and electronic structure

KW - Uranium oxides

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_76408

UR - http://knowledgecentre.sckcen.be/so2/bibref/3976

U2 - 10.1016/j.jssc.2006.08.038

DO - 10.1016/j.jssc.2006.08.038

M3 - Article

VL - 180

SP - 54

EP - 61

JO - Journal of Solid State Chemistry

JF - Journal of Solid State Chemistry

SN - 0022-4596

IS - 1

ER -

ID: 128503