The Influence of the Exchangeable Monovalent Cations on Vibrations of Y Zeolite Framework

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Abstract
The influence of the exchangeable monovalent cations on the vibrations of the frame-work of Y zeolite has been studied. A regular shift of the frequencies of some absorption bands is observed and described as a function of interaction between the exchangeable cation and the oxygen from the zeolite framework. The linear dependence of the fre-quencies of some absorption bands and the reciprocal of the sum of ionic radii of the cation and the framework oxygen suggests that the exchanged cations: Na+ , Ag+, K+ and Tl+ are occupying similar positions in the zeolite lattice. Li+ and Cs+ ions do not obey this regularity. The present IR studies agree with the results of chemical analysis of the studied zeolites.

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