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Synthesis study of alkaline-bearing rare earth phosphates with rhabdophane structure

Abstract : The synthesis mechanism of CsCaNd(PO4)(2) from nitrates, carbonates and oxides of the different cations was investigated with the aim of immobilizing cesium. Two transitory phases, a monazite-type one, NdPO4, and a poorly crystallized cesium phosphate, CsCaPO4, were proposed to explain the formation of CsCaNd(PO4)(2). Direct synthesis from NdPO4 and CsCaPO4 was thus carried out. It allowed to underline that within a 900-1000 degrees C temperature range the rhabdophane structure, CsCaNd(PO4)(2), was formed. However, the reaction was also found to be incomplete and this was assumed to be due to a lack of reactivity in concern with the high stability of monazite.
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https://hal-emse.ccsd.cnrs.fr/emse-00449277
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Submitted on : Thursday, January 21, 2010 - 10:45:04 AM
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Lionel Campayo, Fabienne Audubert, Didier Bernache-Assollant. Synthesis study of alkaline-bearing rare earth phosphates with rhabdophane structure. Solid State Ionics, Elsevier, 2005, 176 (35-36), pp.2663-2669. ⟨10.1016/j.ssi.2005.07.007⟩. ⟨emse-00449277⟩

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