Luminescence spectra of KCl-PbCl2 crystals grown from aqueous solutions are compared with those of KCl-PbCl2 crystals grown from a melt. It is found that at PbCl2 concentrations C > 3·10-3 mole % there appears in the luminescence spectrum of "solution-type" crystals a new band with a peak at the 365-nm wavelength, which has never been noted in the case of "melt-type" crystals. The appearance of this band is attributed to (PbCln)-(n-2) complexes entering the crystals when the latter are grown from solutions. The concentration characteristics of ion conductivity are analyzed here and seem to confirm the hypothesis of this complex formation.
ASJC Scopus subject areas
- Physics and Astronomy(all)