Chemistry of Illite/Smectite and End-Member Illite
- 1 August 1986
- journal article
- Published by Cambridge University Press (CUP) in Clays and Clay Minerals
- Vol. 34 (4), 368-378
- https://doi.org/10.1346/ccmn.1986.0340403
Abstract
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; 10(OH)2; total charge = about -0.8; cation-exchange capacity = 15 meq/100 g; surface area (EGME) = 150 m2/g.Keywords
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