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Cesium dizirconium phosphate: Synthesis and thermal properties

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Abstract

Crystalline CsZr2(PO4)3 with the NZP [NaZr2(PO4)3] structure was prepared by a sol gel procedure. The purity and composition of the sample were determined by scanning electron microscopy with energy-dispersive X-ray analysis as well as by X-ray phase analysis and IR spectroscopy. CsZr2(PO4)3 is thermally stable in the range 7 K < T < 1553 K. Temperature dependences of the heat capacity C 0p = f(T) and thermal conductivity λ = f(T) of the phosphate in the range 320–650 K corresponding to thermal conditions of a nuclear waste repository were studied. The standard thermodynamic functions C 0p (T), H 0(T)–H 0(0), S 0(T), and G 0(T)–H 0(0) were calculated. The thermodynamic functions of formation of CsZr2(PO4)3 were calculated. The possibility of decreasing the temperature of the synthesis-immobilization to 1000 K was experimentally confirmed.

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Authors and Affiliations

  1. Lobachevsky State University, Nizhni Novgorod, Russia

    E. A. Asabina, V. I. Pet’kov, A. A. Rodinov & D. B. Kitaev

  2. Russian Research Institute of Experimental Physics, Russian Federal Nuclear Center, Sarov, Nizhni Novgorod oblast, Russia

    V. N. Loshkarev

Authors
  1. E. A. Asabina
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  2. V. I. Pet’kov
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  3. V. N. Loshkarev
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  4. A. A. Rodinov
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  5. D. B. Kitaev
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Original Russian Text © E.A. Asabina, V.I. Pet’kov, V.N. Loshkarev, A.A. Rodionov, D.B. Kitaev, 2006, published in Radiokhimiya, 2006, Vol. 48, No. 3, pp. 205–210.

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Asabina, E.A., Pet’kov, V.I., Loshkarev, V.N. et al. Cesium dizirconium phosphate: Synthesis and thermal properties. Radiochemistry 48, 227–233 (2006). https://doi.org/10.1134/S1066362206030040

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  • DOI: https://doi.org/10.1134/S1066362206030040

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