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Structure and generation mechanism of Br 3 − centres in X‐rayed KBr
Author(s) -
Elango A. A.,
Nurakhmetov T. N.
Publication year - 1976
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.2220780211
Subject(s) - ion , vacancy defect , lattice (music) , crystallography , chemistry , crystal structure , mechanism (biology) , frenkel defect , chemical physics , atomic physics , stereochemistry , physics , quantum mechanics , organic chemistry , acoustics
The structure of V 4 and D 3 centres in KBr and KBr:Sr crystals X‐rayed at 80 K is studied by optical methods. The molecular ion Br 3 −situated in two anion and one cation lattice sites is shown to be the basic entity of the structure of these centres. The creation mechanism of such Br 3 −centres via interaction of H centres is discussed. It is assumed that the interaction of two H centres leads to the local reconstruction of the lattice. The occurrence of one particular process of this kind resulting in a new anion Frenkel pair near a cation vacancy is demonstrated.
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