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15 January 1989 Optical Properties Of Some Natural Diamonds With High Hydrogen Content
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We have demonstrated for the first time that in diamonds some defects correlated with the presence of intense H-related infrared absorptions, also absorb in the visible range. These diamonds exhibit two types of optical absorption spectra, resulting in a browniqh yellow or gray color. We believe that the 1405 and 3107 cm-1 H-related infrared absorptions are not simply due to C-H vibrations, but rather to stretching modes of complexes involving hydrogen and nitrogen in all cases. These types of H-rich brownish yellow and gray diamonds - or sectors of particular stones - are probably the result of cuboid growth.
© (1989) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Emmanuel Fritsch and Kenneth V. G. Scarratt "Optical Properties Of Some Natural Diamonds With High Hydrogen Content", Proc. SPIE 1146, Diamond Optics II, (15 January 1989);


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