Stability and Ion Exchangeability of Clinoptilolite

The similar theme related to various kinds of zeolites and clay minerals has so far often been dealt with by many investigators from the standpoint of industry or of pure science. Nevertheless, a considerable part of the data given previously as those of the ion exchangeability or absorbability for the zeolites have been not so much reliable in the severer sense because of ignoring the instability of their inner structure easily convertible with a slight variation of condition, chemical and/or physical treatments and duration of the reaction even though held at a slightly varied states whereas the most part of their frameworks or the skeletons of so-called channel structure constructed of several-membered rings are seemingly remained to have not been changed. In view of this, some experiments as to clinoptilolite easily obtainable at pure state have been carefully carried out and certain conlcusion expected on the basis of presumption has been reached to more or less satisfactory extent.