The absorption spectra and other optical parameters of organic dye crystals have been studied for several years in the Crystal Optics Laboratory of the Institute of Crystallography, Academy of Sciences, USSR; the results have in part been published . Many growth forms have been examined, in order to find forms with optical orientations suitable for our purposes. Some of the growth forms we found have not previously been described, while others are interesting cases of forms already known. The data are of interest in morphology and growth form contexts. This paper deals with the growth forms of the thiazine and oxazine dyes we have studied.
KeywordsMethylene Blue Growth Form Needle Crystal Component Fiber Methylene Green
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