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The circular dichroism (CD) spectrum of trigonal selenium crystallites formed in a chiral polymer film has been observed. The electronic transition polarization information obtained from the CD spectrum is consistent with the trigonal selenium single crystal reflectivity data of Tutihasi and Chen. The CD sign for the ~610 nm exciton band (polarized perpendicular to c-axis) in trigonal selenium indicates that left-handed helical crystals are formed preferentially over the right-handed crystallites in ethyl cellulose.
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Saeva et al. (1977) studied this question.
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