Abstract
ONE of the crucial arguments put forward by Raman in support of 'tetrahedral' and 'octahedral' diamonds being associated with the Type I and Type II diamonds of Robertson, and Fox and Martin, was that the tetrahedral form should have a certain fundamental vibration frequency active in infra-red absorption and also in scattering, while for the octahedral form this same frequency should be inactive in absorption. Raman identified this frequency with the well-known scattering line at 1,332 cm.-1 and claimed that this frequency coincided with the infrared absorption “between 1350 and 1300 cm.-1” on Type I diamonds. One of the purposes of the paper by Willis and myself was to point out that this last was a serious mis-statement of fact, since the principal infra-red absorption maxima in this region of the spectrum lie at 1,286 cm.-1 and 1,376 cm.-1, of which the former is much more intense than the latter.
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SUTHERLAND, G. Infra-Red Absorption Spectrum of Diamond. Nature 157, 45–46 (1946). https://doi.org/10.1038/157045b0
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DOI: https://doi.org/10.1038/157045b0
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Infra-Red Absorption Spectrum of Diamond
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