The research presented in this book is the experimental work on Growth and Characterizations of Ge S0.5 Se0.5 (I2) single crystals with Chemical Vapour Transport Technique, using Iodine (I2)as a transporting agent. The stoichiometric proportion of constituent elements are confirmed by Energy Dispersive Analysis of X-rays (EDAX). The Structural Parameters are obtained from the X-ray diffraction technique. Four Probe Resistivity Method, High-Pressure Resistivity Method, and Thermoelectric Power Measurements are used to obtain Electrical Parameters of the grown crystal. Optical Band Gap of the grown crystals is derived from UV-Vis Spectroscopy data.