PHASEFORMATION IN THE SYSTEM InAs2S3Se–InAs2Se3S AND PROPERTIES OF OBTAINED PHASES

Compound InAs2S2Se2 was found during studying the system InAs2S3Se–InAs2Se3S. It was established that the compound InAs2S2Se2 melts congruently at 615 K. crystallizes in tetragonal syngony with lattice parameters: а=9.22±0.01, с=5.81±0.002 Å; Z=3. Coordinates of eutectic points: 40 mol % InAs2Se3S, Т=548 K and 60 mol % InAs2Se3S, Т=580 K. Narrow solid solution ranges are formed on the basis of primary components. Solid solutions based on InAs2S3Se at room temperature reach up to 5 mol %, but on the basis of InAs2Se3S – up to10 mol %