High-temperature heat capacity and thermodynamic properties of Pb4V2O9 and Pb8V2O13


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Abstract

The molar heat capacity of Pb4V2O9 and Pb8V2O13 in the temperature range 350–1000 K was measured by differential scanning calorimetry. It was determined that the plot Cp = f(T) for Pb8V2O13 has an extremum within the range 416–516 K, which is due to a phase transition. A correlation was found between the heat capacity and composition of oxides in the PbO–V2O5 system. The data obtained allowed one to predict the specific heat capacity value for Pb(VO3)2.

About the authors

L. T. Denisova

Institute of Nonferrous Metals and Materials Science

Author for correspondence.
Email: antluba@mail.ru
Russian Federation, pr. Svobodnyi 79, Krasnoyarsk, 660041

A. D. Izotov

Kurnakov Institute of General and Inorganic Chemistry

Email: antluba@mail.ru
Russian Federation, Leninskii pr. 31, Moscow, 119991

L. A. Irtyugo

Institute of Nonferrous Metals and Materials Science

Email: antluba@mail.ru
Russian Federation, pr. Svobodnyi 79, Krasnoyarsk, 660041

Yu. F. Kargin

Baikov Institute of Metallurgy and Materials Science

Email: antluba@mail.ru
Russian Federation, Leninskii pr. 49, Moscow, 119991

V. M. Denisov

Institute of Nonferrous Metals and Materials Science

Email: antluba@mail.ru
Russian Federation, pr. Svobodnyi 79, Krasnoyarsk, 660041

V. V. Beletskii

Institute of Nonferrous Metals and Materials Science

Email: antluba@mail.ru
Russian Federation, pr. Svobodnyi 79, Krasnoyarsk, 660041

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