Charge State of Tin Atoms Substituting for Tellurium Atoms in the Structural Network of the Ge_(1-x-y)Sn_yTe_x Glasses

摘要

The Ge_(1-x-y)Sn_yTe_x vitreous alloys are studied using 119Sn Mossbauer spectroscopy.It is found that the quadruply charged tin ions substituting for germanium in the vitreous alloys under investigation forms an sp3 system of chemical bonds,whereas the doubly charged tin ions substituting for tellurium exhibit a metallic character of bonds with tellurium atoms in its own local environment.