Chemistry of illite/smectite and end-member illite

Clays and Clay Minerals
By: , and 



Chemical data from three different series of diagenetic illite/smectites (I/S), analyzed statistically by two regresion techniques, indicate that the content of fixed-K per illite layer is not constant, but ranges from ∼0.55 per O10(OH)2 for illite layers in randomly interstratified I/S (R=0; > 50% smectite layers) to ∼1.0 per O10(OH)2 for illite layers formed in ordered I/S (R>0; <50% smectite layers). By extrapolation of the experimental data, the following chemical characteristics were obtained for end-member illite derived from the alteration of smectite in bentonite: average fixed-K per illite layer = 0.75 per O10(OH)2; total charge = about −0.8; cation-exchange capacity = 15 meq/100 g; surface area (EGME) = 150 m2/g.

Publication type Article
Publication Subtype Journal Article
Title Chemistry of illite/smectite and end-member illite
Series title Clays and Clay Minerals
DOI 10.1346/CCMN.1986.0340403
Volume 34
Issue 4
Year Published 1986
Language English
Publisher The Clay Minerals Society
Contributing office(s) Toxic Substances Hydrology Program
Description 11 p.
First page 368
Last page 378
Google Analytic Metrics Metrics page
Additional publication details