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The state of dispersion of Pb 2+ in highly doped KCl crystals
Author(s) -
Marculescu L.,
Popescu M.,
Baltog I.,
Ghita C.
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.2220770234
Subject(s) - impurity , vacancy defect , precipitation , doping , diffraction , luminescence , dispersion (optics) , dissolution , phase (matter) , materials science , crystallography , analytical chemistry (journal) , dipole , chemistry , optics , physics , optoelectronics , organic chemistry , chromatography , meteorology
The state of dispersion of Pb 2+ in highly doped KCl crystals after different heat treatments is investigated. Optical and X‐ray diffraction measurements show that the new phase formed in KCl crystals by precipitation of the impurity is imperfectly ordered and composed of agglomerations of cation‐vacancy dipoles, different from the case of Pb‐doped NaCl crystals where a PbCl 2 , phase is obtained. X‐ray diffraction and luminescence data show that after both, strong precipitation and dissolution, the impurity evolves towards the same equilibrium state characterized by partial aggregation of Pb 2+ cation‐vacancy dipoles.