We have obtained the direct evidence by high-resolution electron microscopy (HREM) that a pure MEL type zeolite has been successfully synthesized in an all-silica form using a novel organocationic templating agent. It has been also confirmed from a synchrotron X-ray powder diffraction pattern obtained at room temperature that the crystal structure of this all-silica zeolite is of the MEL-type by use of the Rietveld method.
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Terasaki et al. (1996) studied this question.
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