Location of cations in zeolites by infrared and Raman spectroscopy

Abstract

For various hydrated monovalent cationexchanged forms of the synthetic zeolite Linde A a linear relationship has been found between the frequency of some of the framework vibrations and the reciprocal of the sum of the cation and framework oxygen ionic radii; this regularity implies that the Tl⁺,Ag⁺, and Li⁺ions probably occupy similar positions in the crystal structures to those determined for the Na⁺ and K⁺ ions by X-ray crystallography.