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Heat Capacity and Thermal Expansion of Lanthanum Hafnate

  • PHYSICOCHEMICAL ANALYSIS OF INORGANIC SYSTEMS
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Abstract

The molar heat capacity of lanthanum hafnate of the pyrochlore structure type was measured by differential scanning calorimetry in the temperature range 310–1380 K. The temperature dependence of the unit cell parameter a in the range 303–1273 K was characterized. The absence of structural transformations was demonstrated, and the thermal expansion coefficients in this temperature range were estimated.

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ACKNOWLEDGMENTS

This work was performed using equipment of the Center for Common Use of Physical Methods of Investigation of Substances and Materials, Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Moscow, Russia.

We thank A. A. Ashmarin, Candidate of Chemical Sciences, for help in performing high-temperature X-ray diffraction studies.

Funding

This work was supported by the Russian Science Foundation (project no. 18-13-00025).

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Authors and Affiliations

  1. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 119991, Moscow, Russia

    A. V. Guskov, P. G. Gagarin, V. N. Guskov, A. V. Khoroshilov & K. S. Gavrichev

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  1. A. V. Guskov
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  2. P. G. Gagarin
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  3. V. N. Guskov
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  4. A. V. Khoroshilov
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Correspondence to A. V. Guskov.

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Translated by V. Glyanchenko

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Guskov, A.V., Gagarin, P.G., Guskov, V.N. et al. Heat Capacity and Thermal Expansion of Lanthanum Hafnate. Russ. J. Inorg. Chem. 66, 1017–1020 (2021). https://doi.org/10.1134/S0036023621070056

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