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Zeolite frameworks formed from the reactant composition ranges of (15-40)SiO 2 Al 2 O 3 (1.5-12.0)Na 2 O 1500H 2 O heated to 190°C for time periods varying from 20 to 1000 h were examined. Mordenite, ZSM-5, ferrierite and quartz dominated the crystallization fields. Pure ZSM-5 existed only over a narrow range of compositions. Raman and magic-angle spinning...
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