HEAT CAPACITY AND THERMODYNAMIC PROPERTIES OF COMPLEX OXIDES WITH β-PYROCLORE STRUCTURE CsTeMoO6 AND CsV0.625Te1.375O6

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Abstract

The heat capacity of complex oxides with β-pyrochlore structure CsTeMoO6 and CsV0.625Te1.375O6 was investigated by adiabatic vacuum and differential scanning calorimetry in the temperature range of T = 5–500 K. The standard thermodynamic functions: heat capacity Cp o , enthalpy [H°(T)−H°(0)], absolute entropy [S°(T)] and the Gibbs energy [G°(T)−H°(0)] for the range from T → 0 to 500 K were calculated based on the obtained experimental data. The low-temperature (T < 50 K) heat capacity dependence was analyzed on the basis of multifractal model and chain-layered structure topology of the studied compounds was established.

About the authors

N. N Smirnova

Lobachevsky State University of Nizhny Novgorod

Nizhny Novgorod, Russia

Yu. A Sarmini

Lobachevsky State University of Nizhny Novgorod

Nizhny Novgorod, Russia

A. V Markin

Lobachevsky State University of Nizhny Novgorod

Email: markin@chem.unn.ru
Nizhny Novgorod, Russia

D. G Fukina

Lobachevsky State University of Nizhny Novgorod

Nizhny Novgorod, Russia

E. V Suleimanov

Lobachevsky State University of Nizhny Novgorod

Nizhny Novgorod, Russia

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