H 2 O Related Centers in Potassium Chloride | Zendy

Kuczynski G. C. | Zendy; Dietz P. E. | Zendy; Hamill W. H. | Zendy; Jischke J. H. | Zendy

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H 2 O Related Centers in Potassium Chloride

Author(s) -

Kuczynski G. C.,

Dietz P. E.,

Hamill W. H.,

Jischke J. H.

Publication year - 1978

Publication title -

physica status solidi (b)

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.51

H-Index - 109

eISSN - 1521-3951

pISSN - 0370-1972

DOI - 10.1002/pssb.2220870222

Subject(s) - irradiation , potassium , aqueous solution , annealing (glass) , chloride , electron , chemistry , center (category theory) , electron beam processing , crystallography , analytical chemistry (journal) , photochemistry , nuclear chemistry , materials science , organic chemistry , physics , nuclear physics , quantum mechanics , composite material

Vacuum annealing of crystals of KCl at 600 °C produces stable defect centers which trap electrons during uv or γ irradiation as well as during additive coloration. When vacuum annealed crystals are exposed to 2 atm H 2 O at 200 °C prior to γ irradiation, coloration is suppressed, including the F band. This may be due to displacement of an electron from F by interstitial H 2 O which occupies V Cl −. When previously untreated crystals are exposed to 0.25 atm of HCl at 200 °C and γ‐irradiated, only one of the color centers previously mentioned is observed. The same center is produced in crystals grown from aqueous KCl containing HCl. The center is attributed to H 3 O + F. Precursor H 3 O + (and OH − ) is produced by heating in vacuum at 600 °C. Additional chemical reactions are required to account for the other bands.

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