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Dichroism and birefringence of natural violet diamond crystals

  • Physical Properties of Crystals
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Abstract

Investigation of the optical properties of natural violet diamonds from the Yakutian kimberlites is performed. A red shift of the absorption edge is revealed in the absorption spectra of these crystals. This shift is indicative of the presence of a high concentration of nitrogen in the diamonds studied. Along with the strong band at 0.550 μm, weaker bands at 0.390, 0.456 and 0.496 μm are revealed. It is shown that violet diamond crystals have birefringence and dichroism of about 10−5 and 10−6, respectively. When a light beam propagates perpendicularly to colored lamellas, the dichroism is much larger and the birefringence is smaller than in the case where the beam direction is parallel to lamellas.

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Original Russian Text © A.F. Konstantinova, S.V. Titkov, K.B. Imangazieva, E.A. Evdishchenko, A.M. Sergeev, N.G. Zudin, V.P. Orekhova, 2006, published in Kristallografiya, 2006, Vol. 51, No. 3, pp. 496–503.

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Konstantinova, A.F., Titkov, S.V., Imangazieva, K.B. et al. Dichroism and birefringence of natural violet diamond crystals. Crystallogr. Rep. 51, 465–471 (2006). https://doi.org/10.1134/S1063774506030151

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  • DOI: https://doi.org/10.1134/S1063774506030151

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