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Self diffusion has been studied in single crystals of cyclohexane in the plastic crystalline phase of this solid. In the temperature range −70°C to −30°C there appears to be one diffusion mechanism in operation which is best described by an equationIt is proposed that diffusion occurs by the random walk of relaxed vacancies in the lattice. The concentration of these defects is much higher at the melting point than in other types of solid. It is possible that this high defect concentration could account for the extreme plasticity of this solid.
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Hood et al. (1966) studied this question.
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