Z 1 ‐ and Z 2 ‐centres in mixed crystals of alkali halides doped with Sr ++ | Zendy

Hingsammer J. | Zendy; Jodl H. | Zendy

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Z 1 ‐ and Z 2 ‐centres in mixed crystals of alkali halides doped with Sr ++

Author(s) -

Hingsammer J.,

Jodl H.

Publication year - 1968

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.19680260127

Subject(s) - halide , alkali metal , doping , chemistry , ion , absorption (acoustics) , substitution (logic) , analytical chemistry (journal) , crystallography , composition (language) , absorption spectroscopy , inorganic chemistry , physics , optics , condensed matter physics , organic chemistry , linguistics , philosophy , chromatography , computer science , programming language

In mixed single crystals of KCI‐RbCl: Sr and KCI‐KBr: Sr of various composition grown by the Kyropoulos‐Method Z 1 ‐and Z 2 ‐centres are produced by additive coloration and bleaching. Thus the influence of the substitution of the anions and cations on the spectral position and halfwidth of the Z 1 ‐and 2 ‐bands can be investigated investigated. In the mixed crystals the spectral position of all absorption bands deviates from the Mollwo relation (v d n = const) in a different manner for anion and cation substitution. The deviations are similar to those found by Smakula for V 1 ‐centres. The halfwidth of all bands in mixed crystals is greater than in pure systems, and the halfwidth of the Z 1 ‐centres increases by ion substitution more than that of the Z 2 ‐centres. The halfwidth of the 1:1 composition of KCl‐RbCl:Sr and KCl‐KBr:Sr is calculated using the model of Gnaedinger and compared with the measured data.

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