The Sections GeSnSb4Te8–GeTe and GeSnSb4Te8–SnTe of the Quasi-Ternary System GeTe–Sb2Te3–SnTe

By differential thermal, X-ray powder diffraction, and microstructural analyses and microhardness and density measurements, phase equilibria in the sections GeSnSb4Te8–GeTe and GeSnSb4Te8–SnTe were studied and their state diagrams were constructed. It was determined that these sections are quasi-binary sections of the eutectic type of the GeTe–Sb2Te3–SnTe system. The coordinates of the eutectic points in the sections GeSnSb4Te8–GeTe and GeSnSb4Te8–SnTe are (40 mol % GeTe, 700 K) and (30 mol % SnTe, 750 K), respectively. Regions of solid solutions based on the initial components in the sections were identified. Alloys in the regions of solid solutions are p-type semiconductors.