Structure and Physicochemical Properties of the (AsSI)_(1-x)(As2S3)_x and (AsSel)_(1-x)(As_2Se_3)_x Glasses

摘要

The structure and physicochemical properties of glasses in the (AsSI)_(1-x)(As2S3)_x and (AsSeI)_(1-x)(As2Se_3)_x systems are investigated.It is demonstrated using ~(127)I Mossbauer spectroscopy that the structure of the glasses under study is built up of the structural units AsS_(3/2) (AsSe_(3/2)),which correspond to the compounds As2S3 (As2Se3),and the ternary structural units,which correspond to the compounds AsSI (AsSel).In turn,these structural units are connected into a three-dimensional network.The proposed model accounts for the observed linear dependences of the physicochemical properties (density,microhardness,glass transition temperature) of the glasses on the composition.