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High-Temperature Heat Capacity and Thermodynamic Properties of the CaY2Ge3O10 and CaY2Ge4O12 Germanates

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Abstract—

The CaY2Ge3O10 and CaY2Ge4O12 germanates have been synthesized by a standard ceramic processing route using CaCO3, Y2O3, and GeO2 as starting materials, and their crystal structure has been refined by X-ray diffraction. The high-temperature (350–1000 K) experimental heat capacity data obtained for the germanates by differential scanning calorimetry have been used to calculate their principal thermodynamic functions.

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ACKNOWLEDGMENTS

We are grateful to the Krasnoyarsk Regional Shared Research Facilities Center, Krasnoyarsk Scientific Center (Federal Research Center), Siberian Branch, Russian Academy of Sciences.

Funding

This work was supported in part by the Russian Federation Ministry of Science and Higher Education as part of the state research target for the Siberian Federal University federal state autonomous educational institution of higher education, project no. FSRZ-2020-0013.

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Authors and Affiliations

  1. Siberian Federal University, 660041, Krasnoyarsk, Russia

    L. T. Denisova, M. S. Molokeev, N. A. Galiakhmetova, V. V. Beletskii & V. M. Denisov

  2. Kirensky Institute of Physics, Krasnoyarsk Scientific Center (Federal Research Center), Siberian Branch, Russian Academy of Sciences, Akademgorodok, 660036, Krasnoyarsk, Russia

    M. S. Molokeev

  3. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, 119991, Moscow, Russia

    Yu. F. Kargin

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  1. L. T. Denisova
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  2. M. S. Molokeev
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  3. Yu. F. Kargin
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  4. N. A. Galiakhmetova
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  5. V. V. Beletskii
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  6. V. M. Denisov
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Correspondence to L. T. Denisova.

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Translated by O. Tsarev

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Denisova, L.T., Molokeev, M.S., Kargin, Y.F. et al. High-Temperature Heat Capacity and Thermodynamic Properties of the CaY2Ge3O10 and CaY2Ge4O12 Germanates. Inorg Mater 58, 414–419 (2022). https://doi.org/10.1134/S0020168522040033

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