Heat capacity of GdBiGeO5 in the temperature range 373–1000 K


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Abstract

Ternary oxide GdBiGeO5 was synthesized by a ceramic method. The heat capacity of crystalline gadolinium bismuth germanate as a function of temperature in the range 373–1000 K has been studied by differential scanning calorimetry. It has been demonstrated that the temperature dependence of the heat capacity can be described by the classical Maier–Kelley equation. From the experimental CP = f(T) data, the thermodynamic functions (the change in enthalpy and entropy) of ternary oxide GdBiGeO5 have been calculated.

About the authors

L. T. Denisova

Institute of Nonferrous Metals and Materials Science

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

A. D. Izotov

Kurnakov Institute of General and Inorganic Chemistry

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

Yu. F. Kargin

Baikov Institute of Metallurgy and Materials Science

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

V. M. Denisov

Institute of Nonferrous Metals and Materials Science

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

N. A. Galiakhmetova

Institute of Nonferrous Metals and Materials Science

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

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