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Abstract <p>This work is devoted to the experimental determination of the enthalpies of formation of the rare-earth tantalates: DyTaO<sub>4</sub> and HoTaO<sub>4</sub>. High-temperature drop-solution calorimetry was applied to determine the values of the heat effects of drop and dissolution of the oxides and the enthalpies of formation from oxides of the orthotantalates at 298 K. The results of the current study alongside with the literature data allowed to obtain the temperature dependencies of the Gibbs free energy of formation from oxides in the high temperature range.</p>

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Formation Enthalpies of the Rare Earth Tantalates DyTaO4 and HoTaO4

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年6月15日

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  • I. A. Bajenova,
  • A. V. Guskov,
  • V. N. Guskov,
  • P. G. Gagarin,
  • A. V. Khvan,
  • K. S. Gavrichev

摘要

Abstract

This work is devoted to the experimental determination of the enthalpies of formation of the rare-earth tantalates: DyTaO4 and HoTaO4. High-temperature drop-solution calorimetry was applied to determine the values of the heat effects of drop and dissolution of the oxides and the enthalpies of formation from oxides of the orthotantalates at 298 K. The results of the current study alongside with the literature data allowed to obtain the temperature dependencies of the Gibbs free energy of formation from oxides in the high temperature range.