Abstract: The basic element of electrochemical SO$-2$//SO$-3$/ sensors based on superionic conductors is the quality of applied material and its crystallographic structure. This paper presents structural analysis of different solid state electrolytes fabricated on the basis of Ag$-2$/SO$-4$/. It was doped with different sulfates. The structures of synthesized materials with different concentrations of sulfates are compared. Ionic conductivity strongly depends on composition of electrolyte and its crystallographic structure. X ray investigations were performed with diffractometer made by Philips using CuK$-$alpha$/ radiation. The influence of dopants on the composition of solid solution of synthesized superionic conductors and on the change of microstructure Ag$-2$/SO$-4$/ was observed and discussed.!5
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