Alkali uranyl borates: bond length, ...
Type de document :
Article dans une revue scientifique: Article original
DOI :
URL permanente :
Titre :
Alkali uranyl borates: bond length, equatorial coordination and 5f states
Auteur(s) :
Hunault, Myrtille O. J. Y. [Auteur]
Synchrotron SOLEIL [SSOLEIL]
Menut, Denis [Auteur]
Synchrotron SOLEIL [SSOLEIL]
Tougait, Olivier [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Synchrotron SOLEIL [SSOLEIL]
Menut, Denis [Auteur]
Synchrotron SOLEIL [SSOLEIL]
Tougait, Olivier [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Titre de la revue :
Crystals
Nom court de la revue :
Crystals
Numéro :
11
Pagination :
56
Date de publication :
2021-01-12
ISSN :
2073-4352
Mot(s)-clé(s) :
HERFD-XANES
structure
covalency
borate
uranyl
structure
covalency
borate
uranyl
Discipline(s) HAL :
Chimie/Matériaux
Résumé en anglais : [en]
Three uranyl borates, UO2B2O4, LiUO2BO3 and NaUO2BO3, have been prepared by solid state syntheses. The influence of the crystallographic structure on the splitting of the empty 5f and 6d states have been probed using High ...
Lire la suite >Three uranyl borates, UO2B2O4, LiUO2BO3 and NaUO2BO3, have been prepared by solid state syntheses. The influence of the crystallographic structure on the splitting of the empty 5f and 6d states have been probed using High Energy Resolved Fluorescence Detected X-ray Absorption Spectroscopy (HERFD-XAS) at the uranium M4-edge and L3-edge respectively. We demonstrate that the 5f splitting is increased by the decrease of the uranyl U-Oax distance, which in turn correlates with an increased bond covalency. This is correlated to the equatorial coordination change of the uranium. The role of the alkalis as charge compensating the axial oxygen of the uranyl is discussed.Lire moins >
Lire la suite >Three uranyl borates, UO2B2O4, LiUO2BO3 and NaUO2BO3, have been prepared by solid state syntheses. The influence of the crystallographic structure on the splitting of the empty 5f and 6d states have been probed using High Energy Resolved Fluorescence Detected X-ray Absorption Spectroscopy (HERFD-XAS) at the uranium M4-edge and L3-edge respectively. We demonstrate that the 5f splitting is increased by the decrease of the uranyl U-Oax distance, which in turn correlates with an increased bond covalency. This is correlated to the equatorial coordination change of the uranium. The role of the alkalis as charge compensating the axial oxygen of the uranyl is discussed.Lire moins >
Langue :
Anglais
Audience :
Internationale
Vulgarisation :
Non
Établissement(s) :
CNRS
Centrale Lille
ENSCL
Univ. Artois
Université de Lille
Centrale Lille
ENSCL
Univ. Artois
Université de Lille
Collections :
Équipe(s) de recherche :
Chimie, matériaux et procédés pour un nucléaire durable (CIMEND)
Date de dépôt :
2022-03-02T07:15:24Z
2023-01-11T10:15:50Z
2023-01-11T10:15:50Z
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