Raman spectra of perovskite-like APbI3 (A = K, Rb, Cs, Tl) have been s
tudied in the temperature range 77 to 295 K. The qualitative analysis
of the Raman spectra has been carried out in terms of the assumption a
bout the significance of the distinguished quasimolecular [PbI6]4- com
plexes in formation of phonon spectra of the crystals.