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CuIn 2n+1 S 3n+2 crystals were synthesized by horizontal Bridgman method using high purity copper, indium, sulfur elements. The phases and crystallographic structure of the CuIn 2n+1 S 3n+2 crystals were analyzed by X-ray diffraction (XRD) and the composition of the material powders was determined using the energy dispersive X-ray analysis (EDX). Measurement data revealed that CuIn 2n+1 S 3n+2 materials have not the same structure. In fact, CuInS 2 and CuIn 3 S 5 crystallize in the chalcopyrite structure whereas CuIn 5 S 8 , CuIn 7 S 11 and CuIn 11 S 17 crystallize in the cubic spinel structure.

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