Abstract
Abstract PbI 2 has been purified using zone refining technique by giving 20 passes. Single crystals of pure and doped PbI 2 were grown by the zone melting and Bridgman-Stockbarger technique. X-ray diffraction (oscillation photographs) studies revealed the absence and presence of arcing i the pure and doped crystals respectively. The reflections corresponding to 4H, 12R and other higher polytypes were observed. DC conductivity (σ) studies were made on these crystals at room temperature. Typical values for σ were found to be ≁10 -8 and ≁2×10 -6 ohm -1 cm -1 for the undoped and doped crystals respectively.
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