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Our research shows that 18 O exchange in NaZSM-5 causes isotopic shifts of the Raman bands of the sample. Shifts of i.r. bands were also detected for framework vibrations and for hydroxyl vibrations as well as for the appropriate combination modes in the spectra of 18 O-exchanged NaZSM-5 and HZSM-5. The largest shifts were found for the most intense i.r. band at about 1,100...
A new approach for retrieving information on cation siting in silicon-rich zeolites like ZSM-5 is presented. It is based on combined investigations using the cation sensitive methods, far-IR spectroscopy and EXAFS together with computer simulations. This combination proved to be successful for alkali and even for alkaline earth ions. It was possible to obtain cation locations for Cs + as...
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