la3ta7的热容和热力学性质

IF 0.8 4区化学 Q4 CHEMISTRY, PHYSICAL

Russian Journal of Physical Chemistry A Pub Date : 2025-07-06 DOI:10.1134/S0036024425700840

P. G. Gagarin, A. V. Guskov, V. N. Guskov, A. V. Tyurin, K. S. Gavrichev

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引用次数: 0

摘要

采用松弛法、绝热法和差示扫描量热法在0 ~ 1860 K的温度范围内测定了网状结构型钽酸镧La3TaO7的摩尔热容；热力学性质：由热容的光滑值计算熵和焓增量；估算了高温区二元氧化物生成钽酸镧的吉布斯能；la3ta7具有较高的稳定性。

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Heat Capacity and Thermodynamic Properties of La3TaO7

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Heat Capacity and Thermodynamic Properties of La3TaO7

The molar heat capacity of lanthanum tantalate La₃TaO₇ of the weberite structural type was measured by the relaxation, adiabatic, and differential scanning calorimetry methods in the temperature range of 0–1860 K; the thermodynamic properties: entropy and enthalpy increment were calculated from the smoothed values of heat capacity; the Gibbs energy of formation of lanthanum tantalate from binary oxides in the high-temperature region was estimated; and La₃TaO₇ was shown to have high stability.

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来源期刊

Russian Journal of Physical Chemistry A 化学-物理化学

CiteScore

1.20

自引率

14.30%

发文量

376

审稿时长

5.1 months

期刊介绍： Russian Journal of Physical Chemistry A. Focus on Chemistry (Zhurnal Fizicheskoi Khimii), founded in 1930, offers a comprehensive review of theoretical and experimental research from the Russian Academy of Sciences, leading research and academic centers from Russia and from all over the world. Articles are devoted to chemical thermodynamics and thermochemistry, biophysical chemistry, photochemistry and magnetochemistry, materials structure, quantum chemistry, physical chemistry of nanomaterials and solutions, surface phenomena and adsorption, and methods and techniques of physicochemical studies.