Abstract
Homogeneous CuIn3Se5crystals 12 mm in diameter and up to 40 mm in length, with a tetragonal defect-chalcopyrite structure were grown by directional solidification. The structural parameters and thermal expansion of the crystals were measured by x-ray diffraction between 90 and 650 K. Throughout the temperature range studied, the c-axis thermal expansion coefficient of CuIn3Se5was found to be much smaller than the a-axis one.
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