FSDP measurements were performed by X-ray diffraction, neutron diffraction and elastic neutron scattering experiments for AgI–Ag2O–V2O5 and some of AgBr–Ag2O–V2O5, AgCl–Ag2O–V2O5 and AgI–AgPO3 glasses at room temperature. FSDP observed by X-ray diffraction was due to the density fluctuation of the network structure. The composition changes of this FSDP profile for AgI–Ag2O–V2O5 glasses corresponded to those of the ionic conductivity and the molar volume. New FSDP was found in the high-AgI region of AgI–Ag2O–V2O5 system by elastic neutron scattering. The FSDP observed by neutron scattering suggested the formation of a medium range order of doped AgI in highly AgI-doped glasses.

Origin of FSDP in Superionic AgI–Ag2O–V2O5 Glasses. H.Takahashi, N.Rikitake, T.Sakuma, Y.Ishii: Solid State Ionics, 2004, 168[1-2], 93-8