Abstract
Phase equilibria in the quasi-ternary system Ag2S–GeS2–P2S5 at 500 K (227 °C) were investigated by physico-chemical analysis methods on 55 (plus 7 glass samples) alloys that were synthesized by direct single-temperature method. Phase diagram of the quasi-binary system Ag7PS6–Ag8GeS6 was also investigated. The limited solid solution ranges of the Ag7PS6 and Ag8GeS6 compounds are formed in the Ag7PS6–Ag8GeS6 system. The crystal structure of the two compositions was investigated by Rietveld method. The unit cell periods of the phases are: а = 1.5108 nm, b = 0.74609(7) nm, c = 1.0571(1) nm for Ag7.9P0.1Ge0.9S6, and а = 1.0403 nm for Ag7.1P0.9Ge0.1S6. Optical band gap was determined from the energy position of optical absorption edge at 293 K (20 °C) at a fixed value of the absorption coefficient α = 300 cm−1.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call