Abstract
Hydroxyl-doped potassium chloride single crystals are colored electrolytically at various temperatures and voltages using a pointed cathode and a flat anode. Characteristic OH − spectral band is observed in the absorption spectrum of uncolored single crystal. Characteristic O −, OH −, U, V 2, V 3, O 2−–V a +, F, R 2 and M spectral bands are observed simultaneously in absorption spectra of colored single crystals. Current–time curve for electrolytic coloration of hydroxyl-doped potassium chloride single crystal and its relationship with electrolytic coloration process are given. Production and conversion of color centers are explained.
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