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Synthesis, Structure, and Thermophysical Properties of EuGaGe2O7

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Abstract

The europium gallium germanate EuGaGe2O7 has been prepared by solid-state reaction in air in the temperature range 1273–1473 K using a stoichiometric mixture of Eu2O3, Ga2O3, and GeO2. Its crystal structure has been determined by X-ray diffraction (sp. gr. P21/c, a = 7.1693(7) Å, b = 6.57008(6) Å, c = 12.7699(1) Å, β = 117.4522(5)°, V = 533.768(8) Å3). The heat capacity of polycrystalline samples has been determined by differential scanning calorimetry in the temperature range 350–1053 K and the experimental data have been used to calculate the thermodynamic properties (enthalpy increment, entropy change, and reduced Gibbs energy change) of EuGaGe2O7.

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Authors and Affiliations

  1. Institute of Nonferrous Metals and Materials Science, Siberian Federal University, Svobodnyi pr. 79, 660041, Krasnoyarsk, Russia

    L. T. Denisova, L. A. Irtyugo, V. V. Beletskii & V. M. Denisov

  2. Kirensky Institute of Physics, Krasnoyarsk Scientific Center Federal Research Center, Siberian Branch, Russian Academy of Sciences, Akademgorodok 50/38, 660036, Krasnoyarsk, Russia

    M. S. Molokeev

  3. Institute of Engineering Physics and Radio Electronics, Siberian Federal University, ul. Akademika Kirenskogo 28/12(B), 660041, Krasnoyarsk, Russia

    M. S. Molokeev

  4. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Leninskii pr. 49, 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. L. A. Irtyugo
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  4. V. V. Beletskii
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  5. Yu. F. Kargin
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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., Irtyugo, L.A. et al. Synthesis, Structure, and Thermophysical Properties of EuGaGe2O7 . Inorg Mater 56, 854–858 (2020). https://doi.org/10.1134/S002016852008004X

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  • DOI: https://doi.org/10.1134/S002016852008004X

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