The structure factors of a-As2(Se x S1-x )3 (0≤x≤1.0) were measured by neutron diffraction, and the behaviors of the first sharp diffraction peaks with change in x were found to differ greatly from those of the other peaks. The positions of the first peaks did not shift with x. From these behaviors, we were able to confirm the presence of layer correlations in As-chalcogenide glasses. The bond lengths of As–S and As–Se do not change with alloying, and the bonding pairs of As and chalcogen atoms are combined randomly.
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Mori et al. (1983) studied this question.
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