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Questioning klinowski's concept of isomorphous substitution of silicon by aluminium in the framework of silicates
Author(s) -
Lutz W.,
Grossmann A.,
Bülow M.,
Gross Th.
Publication year - 1990
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170250205
Subject(s) - aluminosilicate , aluminium , silicon , silicate , substitution (logic) , aluminate , materials science , transformation (genetics) , phase (matter) , chemical engineering , crystallography , inorganic chemistry , catalysis , chemistry , cement , metallurgy , organic chemistry , biochemistry , computer science , engineering , gene , programming language
Silicalite was treated in an alkaline solution of aluminate following Klinowski's instruction for ‘fine tuning’ of zeolitic catalysts. Instead of an isomorphous substitution of framework silicon by aluminium, a partial phase transformation of the silicate into an Al‐rich aluminosilicate gel was observed. A surface re‐alumination of residual crystals takes place.