Abstract
We have summarized experimental data on the phase diagram of the system Ag2S–Ag2Se. Standard thermodynamic functions of four solid solutions in this system have been calculated using the model of regular and subregular solutions: a restricted fcc solid solution γ-Ag2S-Ag2S1−xSex (x<0.3, 867<T<1110K) and complete bcc solid solution series along β-Ag2S–Ag2Se, monoclinic solid solution (α) from Ag2S to Ag2S0.4Se0.6, and orthorhombic solid solution (α) from Ag2S0.3Se0.7 to the Ag2Se. Gmix and Smix have been evaluated using the subregular model for asymmetric solution for the region Ag2S0.4Se0.6–Ag2S0.3Se0.7. The thermodynamic data can be used for modeling in complex natural systems and in matters of semiconductor materials.
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