Thermodynamic properties of crystalline magnesium zirconium phosphate |
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Authors: | V I Pet’kov A S Shipilov A V Markin N N Smirnova |
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Institution: | 1. Lobachevsky State University of Nizhni Novgorod, Nizhni Novgorod, Russia
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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. |
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