Abstract
Measurements of the 205 TI, 23 Na, 1 H, and 27 Al resonance have been made in a range of commercial zeolites. Fine structure was observed in the thallium resonance line from dehydrated (Na-TI)-A zeolites and the peaks in these lines have been associated with specific cation sites. There was rapid self diffusion of the thallium cations in a dehydrated sample of zeolite A with a thallium:sodium ratio of 3:9 and this motion was completely quenched with partial hydration. In general the effect of absorbed water was to increase the mobility of the thallium cations, but in all samples the sodium cations were stationary. The aluminium resonance results indicated changes in the framework structure when sodium cations were replaced by thallium and when the water content changed.
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