We present a study of the Raman and IR spectra of the sp²-bonded carbon clusters C₆₀ and C₇₀, performed in the framework of a three-parameter bond-charge model based on a transferable interatomic potential. A consistent calculation of the relative amplitudes and of the static polarizability has been performed with only one additional parameter besides those entering the dynamics. The calculated spectra are compared with the existing experimental data for C₆₀ and C₇₀. Very good agreement is found for the Raman spectrum of both clusters, whereas the agreement for IR spectra is less satisfactory.
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Sanguinetti et al. (1994) studied this question.
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