Abstract
Publisher Summary This chapter discusses the influence of alcali cations on the incorporation of iron (Fe) into MFI structure in fluoride media. Up to three Fe/u.c. could be introduced into the MFI framework in fluoride-containing media. The presence of Fe in tetrahedral framework position is exhibited by both the white colour of the samples and the isomer shift in Mossbauer spectra. During calcinations, some framework Fe atoms leave the structure. The crystal morphologies and the kinetic data show that the cations exert specific effects in the stabilization of the crystals under development.
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