Phases, lattice parameters and thermal expansion of (Ga_<i>x</i>In_1−<i>x</i>)₂Se₃, 1≥<i>x</i>≥0, between room temperature and melting point

Abstract

The phases, their lattice parameters and the linear coefficient of the lattice thermal expansion were determined by high-temperature X-ray diffraction between room temperature and the melting point for the system (GaxIn1 − x)2Se3 (1 ≥ x ≥ 0). A wide homogeneity range of zinc blende structure was found in the Ga-rich region when a certain critical temperature was reached. In the In-rich region the alloys were isostructural with γ-In2Se3 at all temperatures, and the linear thermal-expansion coefficient was composition dependent.