Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Thermodynamic properties of trizirconium tetraphosphate

Pet'kov, V. I., Asabina, E. A., Kir'yanov, K. V., Markin, A. V., Smirnova, N. N., Kitaev, D. B., Kovalsky, A. M.
J. Chem. Thermodyn. 2005, 37, 5, 467-476
ABSTRACT
The heat capacity measurements of the crystalline trizirconium tetraphosphate were carried out in a low-temperature adiabatic vacuum calorimeter between T = (7 and 350) K and in dynamic calorimeter between T = (330 and 640) K. The experimental data were used to calculate the standard (p = 0.1 MPa) thermodynamic functions (where R is the universal gas constant) in the range T ? (0 to 640) K. The fractal dimension Dfr for the crystalline phosphate Zr3(PO4)4 between T = (20 and 40) K was evaluated. From hydrofluoric acid solution microcalorimetry, the enthalpy of solution of Zr3(PO4)4 at T = 298.15 K was determined and the standard molar enthalpy of formation was derived. By combining the data obtained by the two techniques, the standard molar Gibbs function of formation of Zr3(PO4)4 at T = 298.15 K was calculated.
Compounds
# Formula Name
1 Zr zirconium
2 P phosphorus
3 O2 oxygen
4 O16P4Zr3 trizirconium tetraphosphate
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
  • 4
  • Molar heat capacity at constant pressure, J/K/mol ; Crystal
  • Temperature, K; Crystal
  • Pressure, kPa; Crystal
  • Crystal
  • Small (less than 1 g) adiabatic calorimetry
  • 182
  • POMD
  • 4
  • Molar heat capacity at constant pressure, J/K/mol ; Crystal
  • Temperature, K; Crystal
  • Pressure, kPa; Crystal
  • Crystal
  • automated dynamic calorimeter ADCTTB
  • 169
  • POMD
  • 4
  • Molar heat capacity at constant pressure, J/K/mol ; Crystal
  • Temperature, K; Crystal
  • Pressure, kPa; Crystal
  • Crystal
  • Small (less than 1 g) adiabatic calorimetry
  • 59
  • POMD
  • 4
  • Molar enthalpy function {Hm(T)-Hm(0)}/T, J/K/mol ; Crystal
  • Temperature, K; Crystal
  • Pressure, kPa; Crystal
  • Crystal
  • Small (less than 1 g) adiabatic calorimetry
  • 59
  • POMD
  • 4
  • Molar entropy, J/K/mol ; Crystal
  • Temperature, K; Crystal
  • Pressure, kPa; Crystal
  • Crystal
  • Small (less than 1 g) adiabatic calorimetry
  • 59
  • RXND
  • 1
  • 2
  • 4
  • 3
  • Molar enthalpy of reaction, kJ/mol
  • OTHER:Method:OTHERsMethod:Solution calorimetry and combination with literature data
  • 1