Colour centres in KCl doped with Zn+2, Cd+2, and Hg+2

@inproceedings{BenDor1966ColourCI,
  title={Colour centres in KCl doped with Zn+2, Cd+2, and Hg+2},
  author={L. Ben-Dor and Abraham Glasner and S. Zolotov},
  year={1966}
}
The absorption spectra of additively coloured Zn+2, Cd+2 and Hg+2 doped KCl indicate the formation of monovalent as well as neutral atomic centres. The formation of these centres follows the trapping of electrons by the metal ions added to the KCl.