HEAT CAPACITY AND THERMODYNAMIC PROPERTIES OF COMPLEX OXIDES WITH β-PYROCLORE STRUCTURE CsTeMoO AND CsVTeO

The heat capacity of complex oxides with β-pyrochlore structure CsTeMoO and CsVTeO was investigated by adiabatic vacuum and differential scanning calorimetry in the temperature range of = 5–500 K. The standard thermodynamic functions: heat capacity , enthalpy [], absolute entropy [] and the Gibbs energy [] for the range from → 0 to 500 K were calculated based on the obtained experimental data. The low-temperature ( < 50 K) heat capacity dependence was analyzed on the basis of multifractal model and chain-layered structure topology of the studied compounds was established.