OBSERVATIONS ON GROWTH OF NACL-CRYSTALS OUT OF THE SURFACE OF SODALITE [NA-8(AL6SI6O24)CL-2]

被引:0
作者
HASSIB, AM [1 ]
ANNERSTEN, H [1 ]
机构
[1] UNIV UPPSALA,INST EARTH SCI,S-75122 UPPSALA,SWEDEN
关键词
D O I
10.1107/S0021889894001172
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
When the surface of sodalite [Na-8(Si6Al6O6)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.
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页码:710 / 715
页数:6
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