Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Thermodynamic and spectroscopic properties of KNbTeO6

Knyazev, A. V., Paraguassu, W., Blokhina, A. G., Lelet, M. I., Knyazeva, S. S., Correa Junior, G. B.
J. Chem. Thermodyn. 2017, 107, 26-36
ABSTRACT
In the present work, the temperature dependence of heat capacity of KNbTeO6 has been measured for the first time over the range from 6 K to 332 K by precision adiabatic vacuum calorimetry. The experimental results were used to calculate standard thermodynamic functions, namely the heat capacity Cp o(T), enthalpy H (T) - H (0), entropy S (T) - S (0) and Gibbs function G (T) - H (0), for the range from T= 0 K to 332 K. The phase transitions and thermal decomposition of KNbTeO6 were determined by differential scanning calorimetry. Structural changes in phase transitions were studied by high-temperature Raman spectroscopy.
Compounds
# Formula Name
1 KNbO6Te niobium potassium tellurate (KNbTeO6)
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
  • Triple point temperature, K ; Crystal 3
  • Crystal 3
  • Crystal 2
  • Air at 1 atmosphere
  • DSC
  • 1
  • POMD
  • 1
  • Triple point temperature, K ; Crystal 2
  • Crystal 2
  • Crystal 1
  • Air at 1 atmosphere
  • DSC
  • 1
  • POMD
  • 1
  • Molar heat capacity at constant pressure, J/K/mol ; Crystal 3
  • Temperature, K; Crystal 3
  • Pressure, kPa; Crystal 3
  • Crystal 3
  • Vacuum adiabatic calorimetry
  • 187
  • POMD
  • 1
  • Molar heat capacity at constant pressure, J/K/mol ; Crystal 3
  • Temperature, K; Crystal 3
  • Pressure, kPa; Crystal 3
  • Crystal 3
  • Vacuum adiabatic calorimetry
  • 41
  • POMD
  • 1
  • Molar enthalpy, kJ/mol ; Crystal 3
  • Temperature, K; Crystal 3
  • Pressure, kPa; Crystal 3
  • Crystal 3
  • Vacuum adiabatic calorimetry
  • 41
  • POMD
  • 1
  • Molar entropy, J/K/mol ; Crystal 3
  • Temperature, K; Crystal 3
  • Pressure, kPa; Crystal 3
  • Crystal 3
  • Vacuum adiabatic calorimetry
  • 41
  • POMD
  • 1
  • Mass density, kg/m3 ; Crystal 3
  • Temperature, K; Crystal 3
  • Pressure, kPa; Crystal 3
  • Crystal 3
  • X-ray diffraction
  • 7