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Disordered Gd$_{6}$UO$_{12-δ}$ with the cation antisite defects prepared by a combined mechanochemical−thermal method

Darin, G.; Imakuma, K.; Santiago, R. T.; Da Silva, K. L. 1; Cótica, L. F.; Fabián, M.; Valíček, J.; Hahn, H. 1; Šepelák, V.
1 Institut für Nanotechnologie (INT), Karlsruher Institut für Technologie (KIT)

Abstract:

The synthesis of the rhombohedral Gd$_{6}$UO$_{12-δ}$ is reported via mechanochemical processing of stoichiometric Gd$_{2}$O$_{3}$/UO$_{2}$ mixtures and their subsequent annealing. Rietveld refinement of XRD data reveals that the as-prepared material exhibits a remarkable degree of cation antisite disorder and oxygen deficiency. The simulations of intensities of the selected XRD superlattice reflections are performed for limiting states of Gd$_{6}$UO$_{12-δ}$ with its most extreme degrees of the cation antisite disorder. On the basis of the estimated bond lengths it can be stated that distorted geometry of structural units in the material is a consequence of its relatively large oxygen deficiency.


Postprint §
DOI: 10.5445/IR/1000135080
Veröffentlicht am 01.07.2022
Originalveröffentlichung
DOI: 10.1016/j.jnucmat.2021.152895
Scopus
Zitationen: 1
Web of Science
Zitationen: 1
Dimensions
Zitationen: 1
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 06.2021
Sprache Englisch
Identifikator ISSN: 0022-3115
KITopen-ID: 1000135080
HGF-Programm 43.31.01 (POF IV, LK 01) Multifunctionality Molecular Design & Material Architecture
Erschienen in Journal of nuclear materials
Verlag Elsevier
Band 549
Seiten Art. Nr.: 152895
Nachgewiesen in Dimensions
Scopus
Web of Science
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