%0 Journal Article %T Structural, Morphology and Some Optical Properties of Chalcogenide Ga80-xSexTe20 (Where x = 10%, 15% and 20%) Glassy Material %A Khadijah M. Al Mokhtar %A Bahia O. Alsobhi %J New Journal of Glass and Ceramics %P 91-99 %@ 2161-7562 %D 2017 %I Scientific Research Publishing %R 10.4236/njgc.2017.74008 %X Ga_80-xSe_xTe₂₀ amorphous system was prepared by conventional technique. Structural, morphology and optical properties have been investigated. X-ray diffraction (XRD) patterns reveal the non-crystalline nature of the prepared sample. Differential thermal analysis (DTA) traces indicate the presence glass transition temperature T_gfor all samples below 500буC. Addition T_g values increases by increasing Se content. Energy dispersive X-ray spectroscopy (EDX) data shows good agreement with actual composition. Moreover, surface characterization was achieved by scanning electron microscope (SEM). The patterns confirmed the non-crystalline nature. In order to analyze the data, the cohesive energy C.E was calculated by all three composition optical properties that have been investigated in the wavelength range 500 - 2500 nm. Reflectivity R and transmitivity T spectrum were used to estimate the band gap energy using UV-Visible absorption spectrum. It is worthy mention that the optical band gap follows the T