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The heat capacity and thermodynamic functions of Ca0.5Zr2(PO4)3 crystalline phosphate from T → 0 to 650 K

  • Chemical Thermodynamics and Thermochemistry
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Abstract

The temperature dependence of the heat capacity C o p = f(T) of crystalline calcium-zirconium phosphate was studied over the temperature range 7–650 K by precision adiabatic vacuum and dynamic scanning calorimetry. The experimental data were used to calculate the standard thermodynamic functions C o p (T), H o(T) − H o(0), S o(T), and G o(T) − H o(0) at temperatures from T → 0 to 650 K and the standard entropy of formation of Ca0.5Zr2(PO4)3 at T = 298.15 K. The data on low-temperature (30 K ≤ T ≤ 50 K) heat capacity were used to calculate fractal dimension D. Conclusions about the character of the topology of the structure of the phosphate were drawn.

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Authors and Affiliations

  1. Nizhni Novgorod State University, pr. Gagarina 23, Nizhni Novgorod, 603950, Russia

    V. I. Pet’kov, A. V. Markin, I. A. Shchelokov, N. N. Smirnova & M. V. Sukhanov

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  1. V. I. Pet’kov
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  2. A. V. Markin
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  3. I. A. Shchelokov
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  4. N. N. Smirnova
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  5. M. V. Sukhanov
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Correspondence to V. I. Pet’kov.

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Original Russian Text © V.I. Pet’kov, A.V. Markin, I.A. Shchelokov, N.N. Smirnova, M.V. Sukhanov, 2010, published in Zhurnal Fizicheskoi Khimii, 2010, Vol. 84, No. 4, pp. 621–627.

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Pet’kov, V.I., Markin, A.V., Shchelokov, I.A. et al. The heat capacity and thermodynamic functions of Ca0.5Zr2(PO4)3 crystalline phosphate from T → 0 to 650 K. Russ. J. Phys. Chem. 84, 541–547 (2010). https://doi.org/10.1134/S0036024410040047

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  • DOI: https://doi.org/10.1134/S0036024410040047

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