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Raman Spectrum of Diamond
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In this paper, a new approach to the dynamics of crystal lattices made by Sir C. V. Raman leads in the case of diamond to the result that the atomic vibration spectrum of this crystal should exhibit eight distinct monochromatic frequencies.Abstract:
The new approach to the dynamics of crystal lattices made by Sir C. V. Raman leads in the case of diamond to the result that the atomic vibration spectrum of this crystal should exhibit eight distinct monochromatic frequencies. Of these, the highest frequency (1,332 cm-1 in spectroscopic units) corresponds to the triply degenerate vibration of the two Bravais lattices of the carbon atoms with respect to each other, this being active in the Raman effect. The other seven frequencies represent oscillations of the layers of carbon atoms parallel to the faces of the octahedron or the cube occurring normal or tangential to these planes with the phase reversed at each successive equivalent layer. All the seven modes of vibration of this description are inactive in the Raman effect as fundamentals. The octaves of these frequencies may however, appear as frequency shifts in the Raman spectrum, though with intensities extremely small compared with that of the Raman line of frequency shift 1,332 cm-2. Besides the octaves, various combinations of these frequencies may also appear in the Raman spectrum.read more
Citations
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Scattering of light in crystals
TL;DR: In this paper, the scattering of light with altered frequency has been investigated in many crystals, and much valuable information has been accumulated, and their relation to theories of solid state are clearly matters of great interest.
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Raman Spectrum of Diamond
TL;DR: In this paper, it was shown that the atomic vibration spectrum of a diamond crystal should exhibit eight distinct monochromatic frequencies, the highest frequency corresponds to the triply degenerate vibration of the two Bravais lattices of the carbon atoms with respect to each other, this being active in the Raman effect.
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Temperature variations of the Raman frequencies in diamond
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The scattering of light in diamond and its Raman spectrum
TL;DR: In this paper, a detailed study of the scattering of light in diamond and its Raman spectrum has been made using the λ 2536·5 mercury resonance radiation as exciter, and the velocities of the longitudinal and transverse sound waves estimated from the observed frequency shifts of the displaced components are in agreement with those calculated from the elastic constants of diamond.
References
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Journal ArticleDOI
Two types of diamond
TL;DR: In this article, a number of transparent diamonds were examined by means of a simple ultra-violet spectroscope with fluorescent eye-piece without another diamond transparent beyond X 3000 being found.
Journal ArticleDOI
Raman Effect in Diamond
TL;DR: In this paper, it was shown that quite a small diamond (half carat size) suffices to photograph the Raman spectrum of crystalline carbon, and the wave-number shifts are 1331 cm.
Journal ArticleDOI
Infra-red Spectrum of Diamond by Infra-red Spectrometer and Raman Methods.
Robert Robertson,John Jacob Fox +1 more
TL;DR: In this paper, the authors deduced that diamond should have a frequency varying according to the method of calculation from 7.7 to 11μ, and they used the data given by specific heat, melting point, and photoelectric effect.