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Observations on growth of NaCl crystals out of the surface of sodalite [Na 8 (Al 6 Si 6 O 24 )Cl 2 ]
Author(s) -
Hassib A. M.,
Annersten H.
Publication year - 1994
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889894001172
Subject(s) - sodalite , crystallite , microprobe , electron microprobe , crystallography , etching (microfabrication) , crystal growth , crystal (programming language) , materials science , grain boundary , analytical chemistry (journal) , isotropic etching , mineralogy , chemistry , nanotechnology , zeolite , microstructure , biochemistry , layer (electronics) , chromatography , computer science , programming language , catalysis
When the surface of sodalite [Na 8 (Si 6 Al 6 O 6 )Cl 2 ] crystals was treated with an etching solution, growth of NaCl crystals could be observed. The etchant used is a dilute nitric acid solution. The acid attacks the surface and breaks it down into an Si–Al gel in which the crystals grow rapidly. Optical photography and electron‐microprobe images show crystals with steplike patterns and hollow depressions at the centres of crystal faces. Preferential growth and aggregation of crystallites at grain boundaries is distinctly observed.