Synthesis and High-Temperature Heat Capacity of Sm2Ge2O7 and Eu2Ge2O7

Abstract

The Sm2Ge2O7 and Eu2Ge2O7 germanates have been prepared by solid-state reactions via multistep firing of stoichiometric mixtures of Sm2O3 (Eu2O3) and GeO2 in air at temperatures from 1273 to 1473 K. The molar heat capacity of the samarium and europium germanates has been determined by differential scanning calorimetry in the range 350–1000 K and the C p (T) data have been used to evaluate their thermodynamic properties.

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Correspondence to L. T. Denisova.

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Original Russian Text © L.T. Denisova, L.A. Irtyugo, Yu.F. Kargin, V.V. Beletskii, N.V. Belousova, V.M. Denisov, 2018, published in Neorganicheskie Materialy, 2018, Vol. 54, No. 2, pp. 181–184.

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Denisova, L.T., Irtyugo, L.A., Kargin, Y.F. et al. Synthesis and High-Temperature Heat Capacity of Sm2Ge2O7 and Eu2Ge2O7. Inorg Mater 54, 167–170 (2018). https://doi.org/10.1134/S0020168518020048

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Keywords

  • samarium and europium germanates
  • differential scanning calorimetry
  • high-temperature heat capacity
  • thermodynamic properties