LAMELLAR LATTICE SPACING AND IRIDESCENCE INTERFERENTIAL MODEL
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The numerical interferential model of the iridescence phenomenon in plagioclases has been developed. Iridescence spectra for group of reference labradorite samples with different iridescence colors have been calculated on the basis of interferential model. Modeling spectra of reference samples correspond to experimental ones within the error of 10-15 %. The possibility of iridescence plagioclases out of a visible range (in ultra-violet and near infrared areas) is proved as a result of modeling. The existence of interferential maxima in near infrared area is experimentally confirmed.
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