The Ag2S–Ga2S3–As2S3
system
Chem.
Met. Alloys 8 (2015) 22-26
https://doi.org/10.30970/cma8.0299
T.L. KLYMUK, I.D. OLEKSEYUK, I.I.
MAZURETS’
The Ag2S–Ga2S3–As2S3
system was investigated by differential thermal and X-ray diffraction. The phase
diagrams of the systems Ag2S–As2S3, Ag9GaS6–Ag3AsS3,
AgGaS2–AgAsS2, and AgGaS2–Ag3AsS3
were constructed, as well as the liquidus surface
projection and the isothermal section at 500 K. The interaction in the Ag2S–As2S3
system is eutectic and is described by the equations Le1
↔ Ag2S + Ag3AsS3 (e1: 25 mol.% As2S3, 720 K), Le2
↔ AgAsS2 + Ag3AsS3 (e2: 40
mol.% As2S3, 650 K), and Le3 ↔
AgAsS2 + As2S3 (e3: >99 mol.% As2S3,
580 K). The eutectic point in the AgGaS2–AgAsS2
system lies at 94 mol.% AgAsS2, 653 K.
The coordinates of the eutectic in the AgGaS2–Ag3AsS3
system are 92 mol.% Ag3AsS3,
670 K, and in the Ag9GaS6–Ag3AsS3
system the eutectic lies at 90 mol.% Ag3AsS3, 687 K.
Isothermal section of the Ag2S–Ga2S3–As2S3 system at 500 K.
Keywords
Phase
diagram / Isothermal section / Liquidus surface
projection