PHASE EQUILIBRA IN THE Ag2Se–Ag8GeSe6–Ag8SiSe6 SYSTEM AND CHARACTERIZATION Of the Ag8Si1-xGexSe6 SOLID SOLUTIONS

G.M. Ashirov, K.N. Babanly, L.F. Mashadiyeva, Y.A. Yusibov, M.B. Babanly