Title: Structure of UC2 and U2C3: XRD, 13C NMR and Exafs Study
Authors: CARVAJAL NUNEZ URSULAELOIRDI RachelPRIEUR DAMIENMARTEL LAURALOPEZ HONORATO EddieFARNAN I.VITOVA T.SOMERS Joseph
Citation: JOURNAL OF ALLOYS AND COMPOUNDS vol. 589 p. 234-239
Publisher: ELSEVIER SCIENCE SA
Publication Year: 2014
JRC N°: JRC83937
ISSN: 0925-8388
URI: http://www.sciencedirect.com/science/article/pii/S0925838813029447#
http://publications.jrc.ec.europa.eu/repository/handle/JRC83937
DOI: 10.1016/j.jallcom.2013.11.202
Type: Articles in periodicals and books
Abstract: In this study, uranium dicarbide (UC2) has been prepared by arc melting and heat treated under vacuum to form uranium sequicarbide (U2C3) in the presence of a second phase UC2-z. Both samples, as cast and heat treated, have been characterised by chemical analyses, X-ray diffraction (XRD), 13C magic angle spinning nuclear magnetic resonance (MAS-NMR) and by extended X-ray absorption fine structure (EXAFS). The composition, the purity, the various environments of both U and C atoms as well as the bonds length with the coordination number have been determined. By combining a long-range order method (XRD) and short-range order spectroscopy techniques (EXAFS and NMR), a unique view on the microstructure of UC2, before and after heat treatment, and of U2C3 phase has been achieved.
JRC Directorate:Nuclear Safety and Security

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