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Thermodynamic Properties of Gadolinium Tantalate Gd3TaO7

  • CHEMICAL THERMODYNAMICS AND THERMOCHEMISTRY
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Abstract

Relaxation, adiabatic, and differential scanning calorimetry in the 2–1350 K range of temperatures are used to measure the molar heat capacity of synthesized gadolinium tantalate Gd3TaO7 characterized via X-ray diffraction, scanning electron microscopy (SEM), and chemical analysis. Such thermodynamic functions of the sample as entropy, the change in enthalpy, and reduced Gibbs energy are calculated. The enthalpy of formation of Gd3TaO7 from elements is determined from literature data. Gadolinium tantalate’s Gibbs energy of formation from oxides in the range of high temperatures is calculated to estimate the stability of gadolinium tantalate relative to its constituent oxides.

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Funding

This work was performed on equipment at the shared resource center of the Kurnakov Institute of General and Inorganic Chemistry under the terms of grant no. 18-13-00025 from the Russian Science Foundation (https://rscf.ru/project/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. Tyurin, 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. Tyurin
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  5. A. V. Khoroshilov
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  6. K. S. Gavrichev
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Correspondence to V. N. Guskov.

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Translated by E. Glushachenkova

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Guskov, A.V., Gagarin, P.G., Guskov, V.N. et al. Thermodynamic Properties of Gadolinium Tantalate Gd3TaO7. Russ. J. Phys. Chem. 96, 1195–1203 (2022). https://doi.org/10.1134/S0036024422060103

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