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Cesium and Its Analogs, Rubidium and Potassium, in Rhombohedral [NaZr2(PO4)3 Type] and Cubic (Langbeinite Type) Phosphates: 2. Properties: Behavior on Heating, in Aqueous Solutions, and in Salt Melts

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Abstract

The properties (behavior on heating, in aqueous solutions, and in salt melts) of orthophosphates A2RM(PO4)3, A2B0.5Zr1.5(PO4)3, and ABR2(PO4)3 [A = K, Rb, Cs; B = Mg, Sr, Ba; R = Ga, Fe, Cr, Ln (Ce-Lu)] crystallizing in the structure of langbeinite mineral (cubic system, space group P213, Z = 4) were studied and compared with those of NZP-type phosphates. The thermal transformations of the structure and the influence of temperature on the distortion of the framework-forming polyhedra were examined. The volatilization of cesium, in particular, from the solid phase in the course of its formation, was evaluated. The rates of cesium and barium leaching at 90 and 95°C were determined.

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Authors and Affiliations

  1. Chemical Faculty, Lobachevsky Nizhni Novgorod State University, Nizhni Novgorod, Russia

    A. I. Orlova, V. A. Orlova & A. V. Buchirin

  2. RT-1 Radiochemical Plant, Mayak Production Association, Federal State Unitary Enterprise, Ozersk, Chelyabinsk oblast, Russia

    K. K. Korchenkin

  3. Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Dubna, Moscow oblast, Russia

    A. I. Beskrovnyi

  4. Research Institute of Chemistry, Chemical Faculty, Lobachevsky Nizhni Novgorod State University, Nizhni Novgorod, Russia

    V. T. Demarin

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  1. A. I. Orlova
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  2. V. A. Orlova
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  3. A. V. Buchirin
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  4. K. K. Korchenkin
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  5. A. I. Beskrovnyi
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  6. V. T. Demarin
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__________

Translated from Radiokhimiya, Vol. 47, No. 3, 2005, pp. 213–218.

Original Russian Text Copyright © 2005 by A. Orlova, V. Orlova, Buchirin, Korchenkin, Beskrovnyi, Demarin.

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Orlova, A.I., Orlova, V.A., Buchirin, A.V. et al. Cesium and Its Analogs, Rubidium and Potassium, in Rhombohedral [NaZr2(PO4)3 Type] and Cubic (Langbeinite Type) Phosphates: 2. Properties: Behavior on Heating, in Aqueous Solutions, and in Salt Melts. Radiochemistry 47, 235–240 (2005). https://doi.org/10.1007/s11137-005-0079-5

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  • DOI: https://doi.org/10.1007/s11137-005-0079-5

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