The Raman spectrum of orthorhombic sulphur has been measured in the frequency range 0‐100 cm −1 for all polarisations. The A 1 g ( zz ) and B 1 g ( xy ) spectra have been clarified by later subtraction of unwanted scattering belonging to other polarisations. Definite assignments are made for all but one A 1 g and one B 2 g mode. An interpretation of the intensities observed in the A 1 g and B 1 g spectra is given in terms of the rotational motion of the S 8 molecules affecting their contribution to the crystal polarisability.
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Arthur et al. (1974) studied this question.
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