The Thermal Stability ofF-Centers in Alkali Halides

Abstract
The R-band reported previously in additively colored KCl has been found to contain a distinct band which, above a certain total color-center concentration, is in heterogeneous thermal equilibrium with the F-centers. The variation of the saturation concentration of F-centers with temperature has been studied and a latent heat for the dissociation of the coagulated centers has been determined.