Thermodynamics Research Center / ThermoML | Thermochimica Acta

Calorimetric Study of AlNd2: Heat capacity; Standard Gibbs Energy of Formation

Morishita, M.[Masao], Yamamoto, H.[Hiroaki], Kodera, M.[Masahiro], Keiichiro, I.[Ikeda], Miura, S.[Seiji], Yamada, Y.[Yoshihiro]
Thermochim. Acta 2011, 526, 1-2, 90-8
ABSTRACT
The thermodynamic properties of the magnetic phase transition from ferro to para- phases of AlNd2 were directly investigated by using calorimetry. The standard entropies of formation of the ferro and and paramagnetic phases were determined by measuring the heat capacity from 2 to 300 K. The standard enthalpies of formation of them were determined by combining Cp with the standard enthalpy of formation at 298 K obtained by acid solution calorimetry. The standard Gibbs energies of formation of the ferro and paramagnetic phases of AlNd2 were determined from them. The values of the standard Gibbs energies of formation indicate that the magnetic phase transition from ferro to paramagnetic phases occurs at 37.8 K, consistent with the observed phase transition at 37.8 K.
Compounds
# Formula Name
1 AlNd2 aluminum, compound with neodymium (1:2)
2 Al aluminum
3 Nd neodymium
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 3
  • Temperature, K; Crystal 3
  • Pressure, kPa; Crystal 3
  • Crystal 3
  • Relaxation calorimetry
  • 25
  • POMD
  • 1
  • Molar heat capacity at constant pressure, J/K/mol ; Crystal 2
  • Temperature, K; Crystal 2
  • Pressure, kPa; Crystal 2
  • Crystal 2
  • Relaxation calorimetry
  • 74
  • POMD
  • 1
  • Molar heat capacity at constant pressure, J/K/mol ; Crystal 1
  • Temperature, K; Crystal 1
  • Pressure, kPa; Crystal 1
  • Crystal 1
  • Relaxation calorimetry
  • 72
  • POMD
  • 1
  • Molar heat capacity at constant pressure, J/K/mol ; Crystal 2
  • Temperature, K; Crystal 2
  • Pressure, kPa; Crystal 2
  • Crystal 2
  • OTHER
  • 2
  • POMD
  • 1
  • Molar heat capacity at constant pressure, J/K/mol ; Crystal 1
  • Temperature, K; Crystal 1
  • Pressure, kPa; Crystal 1
  • Crystal 1
  • OTHER
  • 7
  • POMD
  • 1
  • Molar enthalpy, kJ/mol ; Crystal 2
  • Temperature, K; Crystal 2
  • Pressure, kPa; Crystal 2
  • Crystal 2
  • OTHER
  • 4
  • POMD
  • 1
  • Molar enthalpy, kJ/mol ; Crystal 1
  • Temperature, K; Crystal 1
  • Pressure, kPa; Crystal 1
  • Crystal 1
  • OTHER
  • 8
  • POMD
  • 1
  • Molar entropy, J/K/mol ; Crystal 2
  • Temperature, K; Crystal 2
  • Pressure, kPa; Crystal 2
  • Crystal 2
  • OTHER
  • 3
  • POMD
  • 1
  • Molar entropy, J/K/mol ; Crystal 1
  • Temperature, K; Crystal 1
  • Pressure, kPa; Crystal 1
  • Crystal 1
  • OTHER
  • 8
  • POMD
  • 2
  • Molar heat capacity at constant pressure, J/K/mol ; Crystal
  • Temperature, K; Crystal
  • Pressure, kPa; Crystal
  • Crystal
  • Relaxation calorimetry
  • 70
  • POMD
  • 3
  • Molar heat capacity at constant pressure, J/K/mol ; Crystal
  • Temperature, K; Crystal
  • Pressure, kPa; Crystal
  • Crystal
  • Relaxation calorimetry
  • 149
  • RXND
  • 2
  • 3
  • 1
  • Molar enthalpy of reaction, kJ/mol
  • Solution calorimetry
  • 1