Structure and lattice dynamics of the ordered phase of solid C70

Nelissen, B.J.; van Loosdrecht, P.H.M.; Verheijen, M.A.; van der Avoird, A.; Meijer, Gerard

doi:10.1016/0009-2614(93)89011-6

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Structure and lattice dynamics of the ordered phase of solid C₇₀

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Nelissen, B., van Loosdrecht, P., Verheijen, M., van der Avoird, A., & Meijer, G. (1993). Structure and lattice dynamics of the ordered phase of solid C₇₀. Chemical Physics Letters, 207(4-6), 343-348. doi:10.1016/0009-2614(93)89011-6.

Cite as: https://hdl.handle.net/21.11116/0000-000C-157F-F

Abstract

Harmonic lattice dynamics calculations have been performed on the low temperature structure of solid C₇₀. The theoretically obtained lattice structure agrees with the experimentally determined low temperature structure and the symmetry is found to be P2₁/m. The orientationally ordered equilibrium is obtained by using van der Waals interactions only, i.e. without including Coulomb interactions. The calculations yield additional information on the orientational ordering. The calculated frequencies of the 12 Raman active lattice modes agreee quantitatively with the recently observed Raman spectrum. The frequencies of the nine complementary IR active lattice modes are predicted.