Thermodynamic properties of crystalline magnesium zirconium phosphate

Heat capacity (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 (T), HA degrees(T) - HA degrees(0), SA degrees(T), GA degrees(T) - HA degrees(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 a parts per thousand currency sign T/K a parts per thousand currency sign 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.