Effect of tellurium substitution in Sn10Sb20Se70−X TeX (0 < X < 12) amorphous chalcogenide system R. Chander and R. Thangaraj Eur. Phys. J. Appl. Phys., 48 1 (2009) 10302 Published online: 04 July 2009 DOI: 10.1051/epjap/2009115