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The symmetry properties of the lattice dynamics of nonrigid molecular crystals are discussed on mass‐weighted translational coordinates and inertia moment‐weighted rotational coordinates as well as molecular internal normal coordinates in molecular principal axes frame. An equivalent reducible representation of the wavevector group and the classification of molecular crystal normal modes are provided. A detailed illustrative example is presented.
Chinese Journal of Chemistry – Wiley
Published: May 1, 1988
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