Solid State Ionics, Vol.70-71, 167-175, 1994
Raman and Dilatometric Studies of Rbagso4 and Tlagso4 Fast-Ion Conductors
Rb(Tl)AgSO4 ceramics have been studied by dilatometry and Raman scattering. Two sequences of phase transitions, a stable and a metastable ones, have been determined and their relationships are discussed. A high local disorder is evidenced below the temperature of the high conductivity phase and even at liquid helium temperature.
Keywords:CS1-XMXHSO4 PROTONIC CONDUCTORS;SUPERIONIC PHASE-TRANSITION;SOLID ELECTROLYTE;BETA-ALUMINA;ORIENTATIONAL DISORDER;VIBRATIONAL-SPECTRA;LITHIUM-SULFATE;CONDUCTIVITY;SUBSTITUTION;NASICON