Role of heteroatoms in precursor formation of zeolites
作者： Toru Wakihara , Wei Fan , Yasuhiro Suzuki , Masaru Ogura , Shinji Kohara
DOI: 10.1016/S0167-2991(07)80884-6
关键词: Amorphous solid 、 Crystallography 、 Heteroatom 、 Mordenite 、 Microporous material 、 Crystallization 、 Molecular sieve 、 Ring size 、 Inorganic chemistry 、 Ring (chemistry) 、 Materials science
摘要: The structures of amorphous precursors formed prior to the onset crystallization microporous aluminosilicates (mordenite) and zincosilicates (VPI-7) are determined employing high-energy X-ray diffraction (HEXRD) technique. Without heteroatoms, silicate ring size is distributed around 6 (6R). Aluminum incorporation promotes formation smaller rings (especially 4R), while zinc 3R before their crystallizations. statistics for crystalline zeolites in corresponding precursors.
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