Summary
From microphotometric studies of the Raman spectrum of diamond, the distribution of intensity in it has been derived. The spectra themselves exhibit much observable fine structure, including several sharply-defined and intense lines. The intensity curve also exhibits steep drops to zero near the frequency shifts 2176 and 2665 cm.−1 These facts are discussed and it is shown that the features mentioned, as also the appearance of second-order Raman spectra generally with crystals, are irreconcilable with the Born-Karman theory of lattice vibrations.
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Communicated by Prof. R.S. Krishnan,f.a.sc.
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Narayanan, P.S. The distribution of intensity in the Raman spectrum of diamond. Proc. Indian Acad. Sci. (Math. Sci.) 34, 1 (1951). https://doi.org/10.1007/BF03172260
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DOI: https://doi.org/10.1007/BF03172260