On the possibility of realization of monazite and langbeinite structural types in complex americium and plutonium phosphates. Synthesis and X-ray diffraction studies
2011
The existence of phosphates containing Am + Pu with monazite-type structure and of those containing Am + Zr with langbeinite-type structure was substantiated on the basis of the main principles of isomorphism. The compounds were synthesized and examined by X-ray diffraction. Samples of the composition CdAmPu(PO4)3 crystallized in the monazite structural type. In the sample containing Am + Zr, in which the formation of a langbeinite-type compound was expected by analogy with lanthanides and Zr [isoformula phosphates K2LnZr(PO4)3, where Ln = Ce-Yb, are known], a mixture of monazite and kosnarite phases was obtained from the chosen reactants under the chosen conditions.
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