ABSTRACT

Heat capacity and enthalpy increments of ternary strontium bismuth(III) oxides SrBi2O4 and Sr2Bi2O5 were measured by the relaxation time method (2!V210 K), DSC (253!V352 K) and drop calorimetry (570!V1072 K). Temperature dependencies of the molar heat capacity in the form Cpm = 161.97 + 45.936 e10!V3!PT !V 1.7862 e106/T 2 J K!V1 mol!V1 and Cpm = 197.48 + 87.463 e10!V3!PT !V 1.9282 e106/T 2 J K!V1 mol!V1 for SrBi2O4 and Sr2Bi2O5, respectively, were derived by the least-squares method from the experimental data. The molar entropies at 298.15 K, ScentsXm(298.15 K) = 206.1 b 1.1 J K!V1 mol!V1 for SrBi2O4 and ScentsXm(298.15 K) = 261.2 b 1.4 J K!V1 mol!V1 for Sr2Bi2O5, were evaluated from the low temperature heat capacity measurements.

Compounds

#	Formula	Name
1	Bi2O4Sr	bismuth strontium oxide (Bi2SrO4)
2	Bi2O5Sr2	bismuth strontium oxide (Bi2Sr2O5)

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	Pycnometric method	1
POMD	1	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Relaxation method	80
POMD	1	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Large sample (1 g) DSC	41
POMD	1	Molar enthalpy, kJ/mol ; Crystal	Lower temperature, K; Crystal Upper temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Drop calorimetry	25
POMD	2	Mass density, kg/m3 ; Crystal	Temperature, K; Crystal Pressure, kPa; Crystal		Crystal	Pycnometric method	1
POMD	2	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Relaxation method	152
POMD	2	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Large sample (1 g) DSC	38
POMD	2	Molar enthalpy, kJ/mol ; Crystal	Lower temperature, K; Crystal Upper temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Drop calorimetry	42

Thermodynamics Research Center / ThermoML | Thermochimica Acta

Heat capacity, enthalpy and entropy of SrBi2O4 and Sr2Bi2O5

Leitner, J.[Jindrich], Sedmidubsky, D.[David], Ruzicka, K.[Kvetoslav], Svoboda, P.[Pavel]

ABSTRACT