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Raman spectra of liquid and crystalline HCN and DCN have been recorded at various temperatures down to 77 °K. The spectra of the liquids are characteristic of hydrogen-bonded compounds. The two solid phases have very similar spectra, in which each fundamental is complicated by an anomalous shoulder on the high-frequency side. Possible explanations for these are given.
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Pézolet et al. (1969) studied this question.
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