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Immobilisation of actinides in phosphate matrices

Abstract : In the field of the immobilisation of high-activity-level and long-life radwaste (HAVL) for a deep underground repository, several phosphate matrices were already proposed as good candidates to delay the release of actinides in the near-field of such disposal. Among them, thorium phosphate–diphosphate (TPD), monazites/brabantites, britholites, and TPD/monazite compositeswere extensively studied. The synthesis of samples doped with actinides (Th, U...) through wet and dry chemistry methods then their complete characterisation are reported. Their chemical durability is also examined. These materials appear as promising matrices to immobilise tetravalent and/or trivalent actinides
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Submitted on : Monday, February 20, 2006 - 5:30:36 PM
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N. Dacheux, Nicolas Clavier, A.-C. Robisson, O. Terra, F. Audubert, et al.. Immobilisation of actinides in phosphate matrices. Comptes Rendus Chimie, Elsevier Masson, 2004, 7, pp.1141-1152. ⟨10.1016/j.crci.2004.02.019⟩. ⟨in2p3-00025655⟩



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