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6Ag2Se + Ag8GeTe6 ↔ 6Ag2Te + Ag8GeSe6 Reciprocal System

  • PHYSICOCHEMICAL ANALYSIS OF INORGANIC SYSTEMS
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Abstract

Here, we present the results of DTA and XRD studies of phase equilibria in the 6Ag2Se + Ag8GeTe6 ↔ 6Ag2Te + Ag8GeSe6 reciprocal system (system A). A Т–х diagram of the Ag8GeSe6–Ag8GeTe6 boundary system, several inner polythermal sections, isothermal sections at 300 and 1000 K, and the liquidus surface projection were plotted. The Ag8GeSe6–Ag8GeTe6 system is a partially quasi-binary system; it features continuous substitutional solid solutions between Ag8GeTe6 and the high-temperature cubic Ag8GeSe6 phase (the δ phase). Once solid solutions are formed, the polymorphic transition temperature in Ag8GeSe6 decreases, thereby stabilizing the ion-conducting cubic phase in the range of ≥40 mol % Ag8GeTe6 compositions at room temperature and below it. System A is shown to be a reversible reciprocal system; its liquidus surface is comprised of three fields, which relate to the primary crystallization of the solid solutions between the high-temperature Ag2Se and Ag2Te (α phase) phases, IT-Ag2Te-base solid solutions (β phase), and the δ phase. The subsolidus portion of system A features complex interactions related to polymorphism in the terminal compounds and in phases based on them.

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Funding

This work was supported by the Science Development Foundation under the President of the Republic of Azerbaijan (project No. EİF-BGM-4-RFTF-1/2017-21/11/4-M-12).

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Authors and Affiliations

  1. Ganja State University, AZ-2000, Ganja, Azerbaijan

    A. J. Amiraslanova, A. T. Mammadova, I. J. Alverdiyev & Yu. A. Yusibov

  2. Institute for Catalysis and Inorganic Chemistry, AZ-1143, Baku, Azerbaijan

    S. Z. Imamaliyeva & M. B. Babanly

  3. Baku State University, AZ-1148, Baku, Azerbaijan

    M. B. Babanly

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  1. A. J. Amiraslanova
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Correspondence to S. Z. Imamaliyeva.

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Translated by O. Fedorova

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Amiraslanova, A.J., Mammadova, A.T., Imamaliyeva, S.Z. et al. 6Ag2Se + Ag8GeTe6 ↔ 6Ag2Te + Ag8GeSe6 Reciprocal System. Russ. J. Inorg. Chem. 68, 1054–1064 (2023). https://doi.org/10.1134/S0036023623601046

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