Abstract
An artificial alteration of both Sericite and its dehydroxylate was tried in NaTPB solution.
Murakami sericite was altered to irregularly interstratified mineral and gradually it seems to become to a 14 Åexpandable mineral. Its dehydroxylate was altered directly to 14Åexpandable mineral but yielded no interstratified mineral. The other hand, Furikusa sericite was altered to regularly interstratified mineral and in the fi nal alteration stage a 14Ånon-expandable mineral was formed. Its dehydroxylate was altered to regularly interstratified mineral.
Above differences between Murakami and Furikusa sericites in the altered products seem to be due to the difference on the distribution of cations such as Si and Al in their tetrahedral sites.
