Evidence of intermediate-range ordering in a superionic (AgI)x(Ag₂O+2B₂{O}₃)_1-x glass is presented. Comparative neutron-diffraction measurements were performed in a low (x=0.1) and a high (x=0.6) -AgI-concentration glass. A strong and sharp diffraction peak at an anomalously low Q value of 0.8 A^-1 is observed for the x=0.6 glass, which is not present in the x=0.1 glass. The phenomenon is attributed to an ordering of the intermediate-range structure, due either to formations of AgI clusters or to density deficits in the boron-oxygen network.
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Börjesson et al. (1989) studied this question.