Abstract
DIPOLAR rotation is well known to occur in a number of organic crystals, for example, d-camphor1 and cyclopentanol2, and in ice3,4 far below the melting point. The dielectric behaviour of these substances is remarkable in that solidification is only shown as a minor discontinuity of the polarization curve, and it may be said that such compounds do not freeze dielectrically at their macroscopic freezing point. In some cases, dipolar rotation stops at a transition taking place at a lower temperature. Whether or not dispersion is observed in the crystalline state should depend on the frequency used.
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References
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SCHALLAMACH, A. Dielectric Dispersion in Crystalline Di-isopropyl Ketone. Nature 158, 619 (1946). https://doi.org/10.1038/158619a0
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DOI: https://doi.org/10.1038/158619a0
