Interaction in the systems TlBiSe2–Tl9BiSe6–PbSe and Tl9BiSe6–Tl4PbSe3–PbSe

Abstract

Phase equilibria in the systems TlBiSe2–Tl9BiSe6–PbSe and Tl9BiSe6–Tl4PbSe3–PbSe were studied by differential thermal, X-ray powder diffraction, and microstructural analyses. State diagrams of the quasi-binary sections Tl9BiSe6–Tl4PbSe3, TlBiSe2–PbSe, and Tl9BiSe6–PbSe were constructed, and so were projections of liquidus surfaces and isothermal sections at 600 K for the secondary quasi-ternary systems TlBiSe2–Tl9BiSe6–PbSe and Tl4PbSe3–Tl9BiSe6–PbSe. The coordinates of invariant points and the boundaries of solid solutions were determined.