Modeling the structure and photostructural changes in amorphous arsenic sulfide

摘要: Models of the atomic structure and photostructural changes amorphous arsenic sulfide, a-As 2 S 3 , are discussed compared with experiment. It is shown that structural units involving two coupled AsS pyramids surrounding a shared atom provide elements intermediate range order, IRO, sufficient to describe available data. These be configured such dihedral angle relationships defined by bonds S-atom make helical bridging sites identifiable. Reversible modeled in terms these units.