Charge distribution in U1-xCexO2+y nanoparticles
In view of a safe management of the nuclear wastes, a sound knowledge of the atomic-scale properties of U1-xMxO2+y nanoparticles is essential. In particular, their cation valences and oxygen stoichiometries are of great interest as these properties drive their diffusion and migration behaviour into the environment. Here, we report an in-depth study of U(1-x)Ce(x)O(2+y), over the full compositional domain, by combining XRD and HEFRD-XANES. We show on one hand the co-existence of U(IV), U(V) and U(VI) and on the other hand that the fluorite structure is maintained despite this charge distribution.
PRIEUR Damien;
VIGIER Jean-Francois;
POPA Karin;
WALTER Olaf;
DIESTE BLANCO Oliver;
VARGA Zsolt;
BECK Aaron;
VITOVA Tonya;
SCHEINOST Andreas;
MARTIN Philippe;
2021-10-14
AMER CHEMICAL SOC
JRC124881
0020-1669 (online),
https://pubs.acs.org/doi/10.1021/acs.inorgchem.1c01071,
https://publications.jrc.ec.europa.eu/repository/handle/JRC124881,
10.1021/acs.inorgchem.1c01071 (online),
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