Abstract

Investigations in the Bi₂O₃–CdO–PbF₂ system using silica tubes as synthesis containers indicate the existence of a large vitreous domain. Structural determination, using powder diffraction and Rietveld methods, has shown that the recrystallized phase is isotypic to the trigonal phase belonging to the Bi₂O₃–PbO–PbF₂ system. Raman studies evidence boson and large peaks, typical of a vitreous phase containing lead in its formulation. Conductivity measurements display σ values close to 10⁻³ S cm⁻¹ at 250 °C with an activation energy of 0.6 eV. These values are among the best obtained for an anionic conductive glass.