The reciprocal CuInS 2+2CdSe⇔CuInSe 2+2CdS system. Part I. The quasi-binary CuInSe 2–CdSe system: Phase diagram and crystal structure of solid solutions

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The type of interaction in quasi-binary system CuInSe 2 (CIS)–CdSe was investigated using differential thermal and X-ray phase analysis methods. The limits of existence of solid solutions based on low-temperature ( α) and high-temperature ( γ) CIS modifications and CdSe ( β) with chalcopyrite, sphalerite and wurtzite structures, respectively, were established in sub-solidus region at 620 K and 870 K. For certain compositions of solid solutions, the structure was refined using powder X-ray diffraction. A phase diagram of the CIS–CdSe system was constructed. A peritectic process L+ β⇔γ takes place in the system at 1260 K.