Abstract

Monoclinic M-type europium orthotantalate was obtained by co-precipitation and annealing at ~1673 K and characterized by X-ray powder diffraction, scanning electron microscopy, and chemical analysis. The temperature dependence of molar heat capacity of M-EuTaO₄ was measured by adiabatic calorimetry at 8–350 K; the thermodynamic functions (entropy, enthalpy change, and reduced Gibbs free energy) were calculated. The general form of contribution of the Schottky anomaly to the molar heat capacity was determined.

中文翻译：

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M -EuTaO 4的热力学性质

摘要

通过在约1673 K下共沉淀和退火获得单斜晶M型原钽酸ate，并通过X射线粉末衍射，扫描电子显微镜和化学分析对其进行表征。M -EuTaO ₄摩尔热容的温度依赖性通过绝热量热法在8–350 K下测量；计算热力学函数（熵，焓变和降低的吉布斯自由能）。确定了肖特基异常对摩尔热容的一般贡献形式。