Abstract
In this paper, the photochromic mechanism of different colors of sodalite and the changes in polysulfide radicals after photochromism were investigated. The results show that the substitution of chlorine by polysulfide radicals forms the basis for photochromism, and two structural defects—chlorine vacancies and oxygen hole centers are involved in the photochromism of sodalite. The decrease in the concentration of polysulfide radical S2− after photochromism leads to reduction in fluorescence intensity. This study explores the reasons for the change in fluorescence intensity caused by the alteration of polysulfide radicals after photochromism, and identifies the types of structural defects within sodalite.
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