Subcolloidal zeolite particles having all the structural features of the zeolite framework but sizes of only a few unit cells which are insufficient to generate a diffraction pattern exist in silicalite-1 synthesis solutions, as revealed by synchrotron-based reflection–absorption IR spectroscopy on zeolite films prepared from clear precursor solutions by the Langmuir–Blodgett method or by spin coating (see picture).
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Tosheva et al. (2008) studied this question.
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