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Journal of Thermal Analysis and Calorimetry

, Volume 115, Issue 2, pp 1453–1463 | Cite as

Thermodynamic properties of crystalline magnesium zirconium phosphate

  • V. I. Pet’kov
  • A. S. Shipilov
  • A. V. Markin
  • N. N. Smirnova
Article

Abstract

Heat capacity \( C_{\text{p}}^{^\circ } \)(T) of crystalline magnesium zirconium phosphate was measured between 6 and 815 K. The experimental data obtained were used to calculate the standard thermodynamic functions \( C_{\text{p}}^{^\circ } \)(T), H°(T) − H°(0), S°(T), G°(T) − H°(0) over the temperature ranging from T  0 to 810 K and standard entropy of formation at 298.15 K. The fractal dimension of Mg0.5Zr2(PO4)3 was calculated from experimental data on the low-temperature (6 ≤ T/K ≤ 50) heat capacity, and the topology of the phosphate’s structure was estimated. Thermodynamic properties of structurally related phosphates M0.5Zr2(PO4)3 (M = Mg, Ca, Sr, Ba, Ni) were compared.

Keywords

Calorimetry Heat capacity Crystalline magnesium zirconium phosphate Thermodynamic functions 

Notes

Acknowledgements

This work was financially supported by the Russian Foundation for Basic Research (Project No. 14-03-00021).

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2013

Authors and Affiliations

  • V. I. Pet’kov
    • 1
  • A. S. Shipilov
    • 1
  • A. V. Markin
    • 1
  • N. N. Smirnova
    • 1
  1. 1.Lobachevsky State University of Nizhni NovgorodNizhni NovgorodRussia

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