Synthesis, Structure, and Thermal Properties of Ca 5 Ga 6 O 14

A. S. Tolkacheva; S. N. Shkerin; A. V. Kuzmin; S. V. Plaksin; I. V. Korzun; V. A. Kochedykov; T. V. Yaroslavtseva; E. G. Vovkotrub

doi:10.1134/S0036024418070294

Synthesis, Structure, and Thermal Properties of Ca₅Ga₆O₁₄

Authors: Tolkacheva A.S.¹^,2, Shkerin S.N.¹, Kuzmin A.V.¹^,2, Plaksin S.V.¹, Korzun I.V.¹, Kochedykov V.A.¹, Yaroslavtseva T.V.³, Vovkotrub E.G.¹
Affiliations:
1. Institute of High-Temperature Electrochemistry, Ural Branch, Russian Academy of Sciences
2. Institute of New Materials and Technologies, Yeltsin Ural Federal University
3. Institute of Solid State Chemistry, Ural Branch, Russian Academy of Sciences
Issue: Vol 92, No 7 (2018)
Pages: 1243-1247
Section: Chemical Thermodynamics and Thermochemistry
URL: https://journals.rcsi.science/0036-0244/article/view/170042
DOI: https://doi.org/10.1134/S0036024418070294
ID: 170042

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Abstract
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Abstract

Calcium gallate Ca₅Ga₆O₁₄ is synthesized by solid-phase means. Its melting point is 1325 ± 2°C. A phase transition of the second kind is observed in the temperature interval of 750–800°C. The temperature dependence of a thermal linear expansion coefficient within 200–900°C is given. Vibrational spectroscopy data confirm that Ca₅Ga₆O₁₄ contains not only GaO₄ tetrahedra but also GaO₆ octahedra.

Keywords

Ca₅Ga₆O₁₄, vibrational spectra, state diagram for CaO–Ga₂O₃

About the authors

A. S. Tolkacheva

Institute of High-Temperature Electrochemistry, Ural Branch,
Russian Academy of Sciences; Institute of New Materials and Technologies, Yeltsin Ural Federal University

Author for correspondence.
Email: mail-content@mail.ru
Russian Federation, Yekaterinburg, 620990; Yekaterinburg, 620002