RAMAN-SCATTERING IN LOW STAGE COMPOUNDS OF GRAPHITE INTERCALATED WITH ASF5, HNO3 AND SBCL5

Raman measurements on low stage compounds of graphite intercalated with AsF5, HNO3 and SbCl5 are reported. The spectrum of the stage 1 C8AsF5 acceptor compound is found to be in sharp contrast with that reported for the donor stage 1 C8M(M=K, Rb, Cs) compounds. Whereas the stage 1 donor compounds have been found to exhibit a characteristic broad, asymmetric Breit-Wigner line shape, the spectrum of C8AsF5 contains a single Lorentzian line in this frequency region. Temperature studies of the bounding layer mode lineshape parameters in C8AsF5 showed no evidence of the order-disorder transition in the adjacent intercalate layer. The bounding layer mode frequencies of AsF5, HNO3 and SbCl5 graphite are reported, but no intercalate layer modes were observed. © 1979.