PHASE EQUILIBRIA IN THE PbGa2Х4–SiХ2 (Х – S, Sе) SYSTEMS

Abstract

Phase equilibria and phase diagrams of the PbGa₂Х₄–SiХ₂ systems (Х –S, Sе) were investigated by X-ray diffraction, differential thermal and microstructure analysis methods. The sulfur-containing system features a new compound of the PbGa₂SiS₆ composition that has incongruent melting nature at 975 K. In the selenide system, the existence of the PbGa₂SiSе₆ compound and the peritectic nature of its formation at 936 K were confirmed. The systems exhibit minor solid solubility ranges of the end compounds.