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PHASE EQUILIBRIA IN THE Bi19S27I3 -“Bi19Se27I3” SYSTEM AND CHARACTERIZATION OF SOLID SOLUTIONS

Year: 2026

Type: article

Abstract: The phase equilibria along the Bi19S27I3 -“Bi19Se27I3” section of the Bi2S3– Bi2Se3 -BiI3 system have been investigated based on a comparative analysis of DTA measurements, PXRD patterns, and SEM results. It has been established that the system is partially stable in the subsolidus area and forms a wide series of solid solutions (δ -phase) with a hexagonal structure based on Bi₁₉S₂₇I₃. The solubility limit based on Bi19S27I3 in this section at room temperature is ~70 mol%. The crystal lattice parameters change linearly within the homogeneity area, in accordance with Vegard's law. Compositions less enriched in Bi₁₉S₂₇I₃ consist of heterogeneous mixtures, including δ-solid solutions based on Bi₂Se₃ and BiSeI. The obtained materials are of interest as potential candidates for thermoelectric and photoelectric applications

Source: Azerbaijan Chemical Journal

DOI: 10.32737/0005-2531-2026-2-145-152

Authors: A.A. Qurbanov, E.J. Ahmadov, A.I. Aghazade, A.R. Aghayeva, V.A. Gasymov, I.J. Alverdiyev

Institutions: Ganja State University, Ministry of Science and Education Republic of Azerbaijan, Institute of Catalysis and Inorganic Chemistry, Azerbaijan State Oil and Industry University, French University of Egypt

Language: English

Topic: Crystal Structures and Properties

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: bronze

OpenAlex ID: W7128168354

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