Short range order and topology of binary Ge-S glasses

Short range order and topology of GexS100-x glasses over a broad composition (20 ≤ x 42 in at%) was investigated by neutron diffraction, X-ray Ge K-edge extended absorption fine structure (EXAFS) measurements. The experimental data sets were fitted simultaneously the framework reverse Monte Carlo simulation method. It found that both constituents (Ge S) satisfy Mott-rule all glasses: S atoms have 4 2 neighbours, respectively. these can be described with chemically ordered network model: Ge-S bonds are preferred; S-S present only S-rich glasses. Dedicated simulations showed Ge-Ge necessary Ge-rich Connections between (such as edge-sharing GeS4/2 tetrahedra) stoichiometric analysed. frequency primitive rings also calculated.