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Synthesis, Crystal Structure, and Thermodynamic Properties of the CaSm2Ge3O10 Germanate in the Range 320–1000 K

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Abstract—

The CaSm2Ge3O10 germanate has been prepared by firing stoichiometric mixtures of CaCO3, Sm2O3, and GeO2 in air in the temperature range 1423–1473 K. X-ray powder diffraction characterization with the use of the derivative difference minimization method has shown that CaSm2Ge3O10 has a monoclinic structure (sp. gr. P21/c, 293 К) with unit-cell parameters a = 6.9779(8) Å, b = 6.92859(7) Å, c = 18.8907(2) Å, and β = 108.3280(8)°. The high-temperature heat capacity of calcium samarium germanate samples has been determined in the temperature range 320–1000 K by differential scanning calorimetry and the experimental Cp(T) data have been used to evaluate thermodynamic properties of CaSm2Ge3O10.

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Authors and Affiliations

  1. Siberian Federal University, 660041, Krasnoyarsk, Russia

    L. T. Denisova, N. A. Galiakhmetova, E. O. Golubeva, V. V. Beletskii & V. M. Denisov

  2. 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. N. A. Galiakhmetova
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  3. Yu. F. Kargin
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  4. E. O. Golubeva
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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., Galiakhmetova, N.A., Kargin, Y.F. et al. Synthesis, Crystal Structure, and Thermodynamic Properties of the CaSm2Ge3O10 Germanate in the Range 320–1000 K. Inorg Mater 59, 93–97 (2023). https://doi.org/10.1134/S0020168523010065

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  • DOI: https://doi.org/10.1134/S0020168523010065

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