DARIN, G., K. IMAKUMA, R.T. SANTIAGO, K.L. DA SILVA, L.F. CÓTICA, M. FABIÁN, Jan VALÍČEK, H. HAHND and Vladimír ŠEPEĽÁK. Disordered Gd6UO12-δ with the cation antisite defects prepared by a combined mechanochemical−thermal method. Journal of Nuclear Materials. AMSTERDAM, NETHERLANDS: ELSEVIER, 2021, 549/2021, June 2021, p. 152895-152900. ISSN 0022-3115.
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Basic information
Original name Disordered Gd6UO12-δ with the cation antisite defects prepared by a combined mechanochemical−thermal method
Authors DARIN, G. (guarantor), K. IMAKUMA, R.T. SANTIAGO, K.L. DA SILVA, L.F. CÓTICA, M. FABIÁN, Jan VALÍČEK (203 Czech Republic, belonging to the institution), H. HAHND and Vladimír ŠEPEĽÁK (703 Slovakia, belonging to the institution).
Edition Journal of Nuclear Materials, AMSTERDAM, NETHERLANDS, ELSEVIER, 2021, 0022-3115.
Other information
Original language English
Type of outcome Article in a journal
Field of Study 20501 Materials engineering
Country of publisher Netherlands
Confidentiality degree is not subject to a state or trade secret
WWW URL
Organization unit Institute of Technology and Business in České Budějovice
Keywords in English Gd6UO12; Cation antisite disorder; Oxygen deficiency; Mechanochemistry; Rietveld refinement
Tags KSTR5, RIV21, SCOPUS
Changed by Changed by: Mgr. Nikola Vyhlidalová, učo 28324. Changed: 30/6/2021 14:31.
Abstract
The synthesis of the rhombohedral Gd6UO12-δ is reported via mechanochemical processing of stoichiomet ric Gd2O3/UO2 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 Gd6UO12-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.
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