Condensed Matter Physics, 1997, No 9, p. 47-56,
The low-temperature orientationaly ordered crystalline phase of fullerene C_60 was investigated in dependence on the external pressure. The vibrational spectrum of C_60 crystal was calculated using the group theory and atom-atom potentials methods. The frequencies of intermolecular modes as the functions of external pressure were studied. An assumption was made that the energy of the lattice includes two contributions: a Lennard-Jones (12-6) potential and electrostatic interaction of charges located on the single and double bonds of C_60 molecule. The results obtained are in good agreement with the available experimental data.Comments: Figs. 4, Refs. 44, Tabs. 1.
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