JMS_V2_N1_RP1 Surbhi Sharma Amit Sarin Navjeet Sharma Journal on Material Science 2347–615X 2 1 1 6 Chalcogenide, Cohesive Energy, Glass transition temperature, Lone pair electrons, Heat of Atomization In this paper an attempt has been made to theoretically find the variation of some important parameters of one of the arsenic fre Ge-Se glass system by the addition of In content. Various parameters like co-ordination number, floppy modes, bond energy, electro negativity, heat of atomization, cohesive energy and glass transition temperature have been calculated for Ge Se In (x=0,1,2,3,4,5,6) glass system. Glass transition temperature (Tg) is calculated by using 16 84-x x two approaches i.e. Tichy-Ticha and Lankhorst approaches. Tg seems to be increasing in theoretical calculations while average single bond energy is decreasing with the increase in the content of In. April - June 2014 Copyright © 2014 i-manager publications. All rights reserved. i-manager Publications http://www.imanagerpublications.com/Article.aspx?ArticleId=2757