Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Thermodynamic and X-ray studies of layered perovskite KCa2NaNb4O13

Knyazev, A.V., Krasheninnikova, O.V., Syrov, E.V., Kyashkin, V.M., Lelet, M.I., Smirnova, N.N.
J. Chem. Thermodyn. 2019, 138, 255-261
ABSTRACT
Thermodynamic properties of Dion-Jacobson type layered perovskite phase KCa2NaNb4O13 were studied. Thermal expansion behaviour and phase transition of the compound were established using hightemperature X-ray diffraction (HTXRD). Temperature dependence of heat capacity of KCa2NaNb4O13 was measured by precision adiabatic vacuum calorimetry. Thermodynamic functions of the phase, namely, the heat capacity, enthalpy H (T)-H (0), entropy S (T)-S (0) and Gibbs function G (T)-H (0) have been determined for the range from T = 0 K to 345 K based on the experimental data.
Compounds
# Formula Name
1 Ca2KNaNb4O13 calcium niobium potassium sodium oxide (Ca2Nb4KNaO13)
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 2
  • Temperature, K; Crystal 2
  • Pressure, kPa; Crystal 2
  • Crystal 2
  • Vacuum adiabatic calorimetry
  • 148
  • POMD
  • 1
  • Molar heat capacity at constant pressure, J/K/mol ; Crystal 2
  • Temperature, K; Crystal 2
  • Pressure, kPa; Crystal 2
  • Crystal 2
  • Vacuum adiabatic calorimetry
  • 42
  • POMD
  • 1
  • Molar enthalpy, kJ/mol ; Crystal 2
  • Temperature, K; Crystal 2
  • Pressure, kPa; Crystal 2
  • Crystal 2
  • Vacuum adiabatic calorimetry
  • 42
  • POMD
  • 1
  • Molar entropy, J/K/mol ; Crystal 2
  • Temperature, K; Crystal 2
  • Pressure, kPa; Crystal 2
  • Crystal 2
  • Vacuum adiabatic calorimetry
  • 42
  • POMD
  • 1
  • Mass density, kg/m3 ; Crystal 2
  • Temperature, K; Crystal 2
  • Pressure, kPa; Crystal 2
  • Crystal 2
  • X-ray diffraction
  • 11
  • POMD
  • 1
  • Mass density, kg/m3 ; Crystal 1
  • Temperature, K; Crystal 1
  • Pressure, kPa; Crystal 1
  • Crystal 1
  • X-ray diffraction
  • 1