Heat Capacity of the R2Ge2O7 (R = Pr–Lu, Y) Rare-Earth Germanates
- 作者: Denisova L.T.1, Kargin Y.F.2, Belousova N.V.1, Irtyugo L.A.1, Denisov V.M.1, Beletskii V.V.1
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隶属关系:
- Institute of Nonferrous Metals and Materials Science, Siberian Federal University
- Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences
- 期: 卷 55, 编号 9 (2019)
- 页面: 952-958
- 栏目: Article
- URL: https://journals.rcsi.science/0020-1685/article/view/158767
- DOI: https://doi.org/10.1134/S0020168519090024
- ID: 158767
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详细
The R2Ge2O7 (R = Pr–Lu, Y) rare-earth germanates have been prepared by solid-state reactions by firing stoichiometric R2O3 + GeO2 mixtures in air at temperatures in the range 1273–1473 K. The unit-cell parameters (a, c, and V) of the R2Ge2O7 (R = Tb–Lu) compounds have been shown to be linear functions of the ionic radius of the rare-earth elements. The high-temperature heat capacity of polycrystalline samples of the germanates has been determined by differential scanning calorimetry in the temperature range 350–1000 K. The variation in the specific heat of R2Ge2O7 has been shown to be correlated with the dependence of the heat capacity of rare-earth oxides on the ionic radius of the rare-earth element within each tetrad.
作者简介
L. Denisova
Institute of Nonferrous Metals and Materials Science, Siberian Federal University
编辑信件的主要联系方式.
Email: antluba@mail.ru
俄罗斯联邦, Svobodnyi pr. 79, Krasnoyarsk, 660041
Yu. Kargin
Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences
Email: antluba@mail.ru
俄罗斯联邦, Leninskii pr. 49, Moscow, 119991
N. Belousova
Institute of Nonferrous Metals and Materials Science, Siberian Federal University
Email: antluba@mail.ru
俄罗斯联邦, Svobodnyi pr. 79, Krasnoyarsk, 660041
L. Irtyugo
Institute of Nonferrous Metals and Materials Science, Siberian Federal University
Email: antluba@mail.ru
俄罗斯联邦, Svobodnyi pr. 79, Krasnoyarsk, 660041
V. Denisov
Institute of Nonferrous Metals and Materials Science, Siberian Federal University
Email: antluba@mail.ru
俄罗斯联邦, Svobodnyi pr. 79, Krasnoyarsk, 660041
V. Beletskii
Institute of Nonferrous Metals and Materials Science, Siberian Federal University
Email: antluba@mail.ru
俄罗斯联邦, Svobodnyi pr. 79, Krasnoyarsk, 660041
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