Thermodynamics Research Center / ThermoML | Thermochimica Acta

Study of the phase transition and thermodynamic functions of LiMn2O4

Knyazev, A. V., Maczka, M., Smirnova, N. N., Knyazeva, S. S., Chernorukov, N. G., Ptak, M., Shushunov, A. N.
Thermochim. Acta 2014, 593, 58-64
ABSTRACT
The temperature dependence of heat capacity of LiMn2O4 has been measured for the first time in the range from 6 to 347 K by precision adiabatic vacuum calorimetry. The experimental data were used to calculate standard thermodynamic functions, namely the heat capacity, enthalpy H (T) - H (0), entropy S (T) - S (0) and Gibbs function G (T) - H (0), for the range from T - 0 to 347 K. The low-temperature and high-temperature X-ray diffraction were used for the determination of type and temperature of phase transitions and coefficients of thermal expansion. Additional spectroscopic studies were carried out to study the nature of the phase transition from an orthorhombic to cubic phase at 286 K.
Compounds
# Formula Name
1 LiMn2O4 lithium manganese oxide (LiMn2O4)
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 2
  • Crystal 2
  • Crystal 1
  • Gas
  • Adiabatic calorimetry
  • 1
  • POMD
  • 1
  • Molar enthalpy of transition or fusion, kJ/mol ; Crystal 2
  • Crystal 2
  • Crystal 1
  • Gas
  • Adiabatic calorimetry
  • 1
  • POMD
  • 1
  • Molar heat capacity at constant pressure, J/K/mol ; Crystal 2
  • Temperature, K; Crystal 2
  • Pressure, kPa; Crystal 2
  • Crystal 2
  • Small (less than 1 g) adiabatic calorimetry
  • 35
  • POMD
  • 1
  • Molar enthalpy, kJ/mol ; Crystal 2
  • Temperature, K; Crystal 2
  • Pressure, kPa; Crystal 2
  • Crystal 2
  • Small (less than 1 g) adiabatic calorimetry
  • 35
  • POMD
  • 1
  • Molar entropy, J/K/mol ; Crystal 2
  • Temperature, K; Crystal 2
  • Pressure, kPa; Crystal 2
  • Crystal 2
  • Small (less than 1 g) adiabatic calorimetry
  • 35
  • POMD
  • 1
  • Molar heat capacity at constant pressure, J/K/mol ; Crystal 1
  • Temperature, K; Crystal 1
  • Pressure, kPa; Crystal 1
  • Crystal 1
  • Small (less than 1 g) adiabatic calorimetry
  • 9
  • POMD
  • 1
  • Molar enthalpy, kJ/mol ; Crystal 1
  • Temperature, K; Crystal 1
  • Pressure, kPa; Crystal 1
  • Crystal 1
  • Small (less than 1 g) adiabatic calorimetry
  • 9
  • POMD
  • 1
  • Molar entropy, J/K/mol ; Crystal 1
  • Temperature, K; Crystal 1
  • Pressure, kPa; Crystal 1
  • Crystal 1
  • Small (less than 1 g) adiabatic calorimetry
  • 9
  • POMD
  • 1
  • Mass density, kg/m3 ; Crystal 2
  • Temperature, K; Crystal 2
  • Pressure, kPa; Crystal 2
  • Crystal 2
  • X-ray diffraction
  • 4
  • POMD
  • 1
  • Mass density, kg/m3 ; Crystal 1
  • Temperature, K; Crystal 1
  • Pressure, kPa; Crystal 1
  • Crystal 1
  • X-ray diffraction
  • 9
  • POMD
  • 1
  • Molar heat capacity at constant pressure, J/K/mol ; Crystal 2
  • Temperature, K; Crystal 2
  • Pressure, kPa; Crystal 2
  • Crystal 2
  • Small (less than 1 g) adiabatic calorimetry
  • 151
  • POMD
  • 1
  • Molar heat capacity at constant pressure, J/K/mol ; Crystal 1
  • Temperature, K; Crystal 1
  • Pressure, kPa; Crystal 1
  • Crystal 1
  • Small (less than 1 g) adiabatic calorimetry
  • 28