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Influence of additives on the structure and microstructure of lanthanides and actinides oxalate

Abstract : Oxalic conversion is a well-known process in the nuclear industry where it is used for precipitating plutonium as an oxalate thereafter calcinated into an oxide. As there is a strong relationship between the morphology of the oxalate precursor and that of the resulting oxide, it is of interest to control the oxalate structure and microstructure during the precipitation step. The influence of additives on the precipitation of neodymium (III) oxalates, non-radioactive analogs of actinides (III) oxalates, was explored. With the use of nitrilotrimethylphosphonic acid (NTMP), the structure and microstructure of the neodymium oxalates are different from that obtained without additive.
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B. Haidon, A.-L. Vitart, M. Rivenet, B. Arab-Chapelet, P. Roussel, et al.. Influence of additives on the structure and microstructure of lanthanides and actinides oxalate. SCF 2015 - Congrès de la Société Chimique de France, Jul 2015, Lille, France. ⟨cea-02506795⟩

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