锗酸Ca3Sc2Ge3O12的合成及热力学性质

IF 0.9 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Inorganic Materials Pub Date : 2025-03-10 DOI:10.1134/S0020168524700912

L. T. Denisova, L. G. Chumilina, Yu. F. Kargin, G. V. Vasil’ev, V. V. Beletskii, V. M. Denisov

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引用次数: 0

摘要

在1273 ～ 1623 K的温度下，将CaO、Sc2O3和GeO2的化学计量混合物在空气中烧制，通过固相反应制备了锗酸锶钙Ca3Sc2Ge3O12。利用单相样品的x射线衍射数据，我们确定了Ca3Sc2Ge3O12晶体（石榴石结构，sp. gr. Ia \(\bar {3}\) d, a = 12.508（48） Å， V = 1956.92(2) Å3）的单胞参数。用差示扫描量热法测定了多晶样品在320 - 1050k范围内的热容。所得结果已用于计算锗酸锶钙的热力学函数。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Synthesis and Thermodynamic Properties of the Ca3Sc2Ge3O12 Germanate

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Synthesis and Thermodynamic Properties of the Ca3Sc2Ge3O12 Germanate

The calcium strontium germanate Ca₃Sc₂Ge₃O₁₂ has been prepared by solid-state reaction, by firing a stoichiometric mixture of CaO, Sc₂O₃, and GeO₂ in air at temperatures from 1273 to 1623 K. Using X-ray diffraction data for single-phase samples, we have determined the unit-cell parameter of Ca₃Sc₂Ge₃O₁₂ crystals (garnet structure, sp. gr. Ia\(\bar {3}\)d, a = 12.508(48) Å, V = 1956.92(2) Å³). The heat capacity of polycrystalline samples has been determined in the range 320–1050 K using differential scanning calorimetry. The results have been used to calculate thermodynamic functions of the calcium strontium germanate.

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来源期刊

Inorganic Materials 工程技术-材料科学：综合

CiteScore

1.40

自引率

25.00%

发文量

审稿时长

3-6 weeks

期刊介绍： Inorganic Materials is a journal that publishes reviews and original articles devoted to chemistry, physics, and applications of various inorganic materials including high-purity substances and materials. The journal discusses phase equilibria, including P–T–X diagrams, and the fundamentals of inorganic materials science, which determines preparatory conditions for compounds of various compositions with specified deviations from stoichiometry. Inorganic Materials is a multidisciplinary journal covering all classes of inorganic materials. The journal welcomes manuscripts from all countries in the English or Russian language.