Abstract The heat capacity of holmium orthophosphate HoPO4 was studied using an adiabatic and a differential scanning calorimetry in the temperatures intervals 9–338 and 310–1374 K, relatively. Heat capacity anomaly connected with the splitting of ground state electronic levels of f-shell was determined. Values of smoothed thermodynamic functions (heat capacity, entropy, enthalpy change and derived Gibbs energy) in the wide temperature range 9–1374 K were calculated.

中文翻译：

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正磷酸钬 HoPO4 在 9−1370 K 范围内的热力学函数

摘要 使用绝热和差示扫描量热法在 9-338 和 310-1374 K 的温度区间内相对地研究了正磷酸钬 HoPO4 的热容量。确定了与 f 壳基态电子能级分裂相关的热容异常。计算了 9-1374 K 宽温度范围内的平滑热力学函数值（热容、熵、焓变和派生吉布斯能）。