Short range order in AgI–AgPO3 glasses by x-ray diffraction

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Abstract
A structural investigation by x‐ray diffraction is presented on ionic conducting glasses of composition (AgI)x (AgPO3)1−x, with x=0.0, x=0.45, and x=0.55. The radial distribution functions of the AgI‐doped glasses, calculated from the experimental diffracted intensities, are dominated by a peak centered at about 2.80–2.85 Å, which can be ascribed to Ag–I pairs. According to this, model interpretations showed that the diffraction effects are essentially due to the shortest and heaviest pair interactions (Ag–I and Ag–O), while there is no evidence of important structural details at medium range. The compatibility of the results obtained with current models of AgI–AgPO3 glasses is examined.