ABSTRACT

The critical analysis of literature heat capacity data in the temperature range 0-1600 K was carried out. It was shown that joining of Cp(T) curves obtained by the different methods was performed improperly. Experimental heat capacity of LaPO4 was measured in the region 16.324 K by the adiabatic calorimetry. The obtained data allows to consist the results of different works and to fit the lanthanum orthophosphate heat capacity in the wide temperature range. Standard thermodynamic properties were calculated on the basis of the refined heat capacity data.

Compounds

#	Formula	Name
1	LaO4P	lanthanum orthophosphate

Datasets

The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type	Compound-#	Property	Variable	Constraint	Phase	Method	#Points
POMD	1	Mass density, kg/m3 ; Crystal	Temperature, K; Crystal Pressure, kPa; Crystal		Crystal	X-ray diffraction	1
POMD	1	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Small (less than 1 g) adiabatic calorimetry	157
POMD	1	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Small (less than 1 g) adiabatic calorimetry	70
POMD	1	Molar enthalpy, kJ/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Small (less than 1 g) adiabatic calorimetry	70
POMD	1	Molar entropy, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Small (less than 1 g) adiabatic calorimetry	70

Thermodynamics Research Center / ThermoML | Thermochimica Acta

REFINED HEAT CAPACITY OF LAPO4 IN THE TEMPERATURE RANGE 0-1600 K

Gavrichev, K. S., Ryumin, M. A., Tyurin, A. V., Gurevich, V. M., Komissarova, L. N.

ABSTRACT