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Effect of some Me 2+ impurity ions on the lattice parameter of KCI crystals
Author(s) -
StepieńDamm J.,
Łukaszewicz K.
Publication year - 1980
Publication title -
kristall und technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0023-4753
DOI - 10.1002/crat.19800151018
Subject(s) - ion , ionic radius , impurity , dopant , lattice constant , drop (telecommunication) , lattice (music) , doping , chemistry , crystal structure , dipole , analytical chemistry (journal) , crystallography , materials science , condensed matter physics , diffraction , physics , chromatography , optics , telecommunications , organic chemistry , computer science , acoustics
The effect of concentration of substitutional Ca 2+ , Sr 2+ , Ba 2+ and Pb 2+ ions on the lattice parameter of KCI crystals is examined. The amount of lattice contraction induced by the alcaline earths ions qualitatively correlates with the pertinent ionic radii values (relative unit cell contraction induced by one impurity dipole amounts to −0.905, −0.110 and −0.020 for Ca 2+ , Sr 2+ and Ba 2+ ions, respectively). The initial drop of lattice parameter observed at low Me 2+ concentration is tentatively ascribed to the drop of dislocation density. In Pb 2+ doped crystals except for the above initial drop, at higher dopant concentration no effect upon the lattice parameter is found.