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Abstract— <p>The heat capacity of sodium-cesium trimolybdate NaCsMo<sub>3</sub>O<sub>10</sub> was measured by the adiabatic method in the range of 5–319 K. No thermal anomalies in the behavior of heat capacity have been found. However, a feature was revealed indicating the presence of a low-frequency peak in the density of phonon states. The Debye temperature at absolute zero was determined by extrapolating the experimental data to absolute zero. Based on the smoothed heat capacity values, the isobaric thermodynamic functions (entropy, enthalpy increment, reduced Gibbs energy) were calculated in the range of 0–320 K.</p>

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Low-Temperature Thermodynamic Properties of Sodium-Cesium Trimolybdate NaCsMo3O10

  • 期刊论文

  • 发表日期：

    2025年12月8日

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  • M. A. Bespyatov,
  • D. S. Shevelev,
  • V. A. Trifonov,
  • A. A. Nazarova,
  • T. M. Kuzin,
  • N. V. Gel’fond

摘要

Abstract—

The heat capacity of sodium-cesium trimolybdate NaCsMo3O10 was measured by the adiabatic method in the range of 5–319 K. No thermal anomalies in the behavior of heat capacity have been found. However, a feature was revealed indicating the presence of a low-frequency peak in the density of phonon states. The Debye temperature at absolute zero was determined by extrapolating the experimental data to absolute zero. Based on the smoothed heat capacity values, the isobaric thermodynamic functions (entropy, enthalpy increment, reduced Gibbs energy) were calculated in the range of 0–320 K.