Thermodynamic properties of LiZr2(PO4)3 crystal phosphate |
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Authors: | V I Pet’kov A V Markin N N Smirnova |
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Institution: | 1689. Lobachevsky Nizhni Novgorod State University, Nizhni Novgorod, 603950, Russia
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Abstract: | The temperature dependence of the heat capacity of LiZr2(PO4)3 crystal phosphate is studied in an adiabatic vacuum calorimeter in the temperature range of 6 to 358 K. A phase transition caused by the transition of a low-temperature (triclinic) modification to a high-temperature (rhombohedral) modification is observed in the temperature range of 290–338 K and its standard thermodynamic characteristics are estimated and analyzed. Standard thermodynamic functions are calculated from experimental data: heat capacity, enthalpy, entropy, and Gibbs function in the range of T → 0 to 358 K. Fractal dimensionality D is calculated from the data on low-temperature (20 K ≤ T ≤ 50 K) heat capacity and the topology of the phosphate’s structure is estimated. |
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