Experimental Transformation of 2M Sericite into a Rectorite-Type Mixed-Layer Mineral by Treatment with Various Salts

Katsutoshi Tomita
Institute of Earth Sciences, Kagoshima University, Kagoshima, Japan

Abstract: Some dehydroxylated sericites were boiled with solutions of various salts. A rectorite-like regular mixed-layer was formed when 2M sericite was treated with solution containing salts such as NaNO3, Na2SO4, CaSO4, CaCl2, MgCl2 and MgSO4 respectively. A random mica/montmorillonite mixed-layer was formed from 1M sericite. In order to change the 2M sericite into a regularly interstratified mineral, they are heated to the temperature range of dehydroxylation. The formation of a regularly interstratified mineral from 2M sericite can be explained by the change in the (OH) bond direction after the extraction of the potassium ion.

Clays and Clay Minerals; August 1977 v. 25; no. 4; p. 302-308; DOI: 10.1346/CCMN.1977.0250408
© 1977, The Clay Minerals Society
Clay Minerals Society (www.clays.org)