Abstract
IN experiments on the sorption of gases by zeolites, it has been shown1 that, of seven samples of chabazite found in different localities, one showed a much smaller power of sorption than all the others. It was supposed that the cause of this peculiar behaviour of this one sample might be sought in its higher univalent ion (K+, Na+) content, in contrast to the probable higher Ca+ +-content of the other chabazites. We have therefore tried to find the relation between the power of sorption of chabazite and its ionic content. This was done by comparing the sorption of different gases by samples of natural chabazite from Rübendörfel (near Aussig, Czechoslovakia) which had been boiled for two hundred hours in solutions containing K+, Na+, Ca++, Sr++, Ba++, Cd++, or La+++ -ions, in which way we hoped to obtain chabazites containing these ions. The sorbing power of samples so treated differed markedly from that of the original mineral, especially in the case of Na and Kpreparations.
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