Submillimeter vibrational spectra of the superionic conductor RbAg4l5
Volkov A. A., Kozlov G. V., Mirzoev G. I., Gofman V. G.
The IR vibrational spectrum of the superionic conductor RbAg4l5 at frequencies ~16 cm -1 has been observed to split up into a series of narrow lines at low temperatures. The splitting is apparently caused by a localization of sulfur ions at nonequivalent positions in the γ phase.