The phases of quenched fullerenes RbC60

RbC 60 is known to exist in several stable phases as a function of temperature. Particularly interesting systems are obtained if the material is warmed up from a quenched low temperature cubic phase. Subsequently, a dimeric, a monomeric and a polymeric phase are obtained and were analysed by Raman spectroscopy. The dimeric phase is of particular interest, since it exhibits a textbook-like splitting of the degenerated H g modes and an unusual but very well expressed lack of any splitting for the G g modes. This allows a very straight correlation of the spectra to those of C 60 .