ABSTRACT

The heat capacity of magnesium gallate MgGa2O4was measured by adiabatic calorimetry (7-347 K)and differential scanning calorimetry (322-1200 K). Thermodynamic functions (heat capacity, entropy,enthalpy change and derived Gibbs energy) were calculated in the range 0 1200 K. Gibbs energy of forma-tion of MgGa2O4was estimated using the standard entropy S0(298.15 K) from this work: fG0(MgGa2O4,298.15 K) = -1594.3 +- 4.3 kJ mol-1. The Debye characteristic temperature D= 750 +- 20 K was calculatedfrom heat capacity data and from elastic constants.

Compounds

#	Formula	Name
1	Ga2MgO4	magnesium gallate

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	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Vacuum adiabatic calorimetry	51
POMD	1	Molar entropy, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Vacuum adiabatic calorimetry	51
POMD	1	Molar enthalpy, kJ/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Vacuum adiabatic calorimetry	51
POMD	1	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Small sample (50 mg) DSC	19
POMD	1	Molar entropy, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Small sample (50 mg) DSC	19
POMD	1	Molar enthalpy, kJ/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Small sample (50 mg) DSC	19
POMD	1	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Vacuum adiabatic calorimetry	132
POMD	1	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Small sample (50 mg) DSC	177

Thermodynamics Research Center / ThermoML | Thermochimica Acta

Thermodynamic functions of magnesium gallate MgGa2O4 in thetemperature range 0-1200 K

Kondrat'eva, O. N., Tyurin, A. V., Nikiforova, G. E., Khoroshilov, A. V., Smirnova, M. N., Ketsko, V. A., Gavrichev, K. S.

ABSTRACT