Aliyev I.
Doctor of Chemistry, prof., head. lab.

Magammadragimova R.
Scientific collaborator
Institute of Catalysis and Inorganic Chemistry named after M. F. Nagiyev
of the Ministry Science and Education of the Azerbaijan Republic.

Ahmedova C.
Ph.D., associate professor.
Adiyaman University, Faculty Arts and Sciences
Department of Chemistry, Türkiye.

Abstract
To clarify the nature of the chemical interaction between InAs₂S₂Se₂ and In₃As₂S₃Se₃, alloys of various compositions were synthesized. The chemical interaction in the InAs₂S₂Se₂-In₃As₂S₃Se₃ system was studied using complex methods of physicochemical analysis: differential thermal analysis (DTA), X-ray diffraction analysis (XRD), microstructural analysis (MSA), as well as determination of density and microhardness, and a Tx phase diagram was constructed. It has been established that the state diagram of the InAs₂S₂Se₂-In₃As₂S₃Se₃ system is quasi-binary, of the eutectic type. In the system at room temperature, solid solutions based on InAs₂S₂Se₂ reach up to 3 mol %, and based on In₃As₂S₃Se₃ up to 10 mol %. The compounds InAs₂S₂Se₂ and In₃As₂S₃Se₃ form a eutectic with a composition of 25 mol % In₃As₂S₃Se₃, temperature 265°C.

Keywords: phase, systems, semiconductor, microhardness, density