Chemistry of illite/smectite and end-member illite
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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; <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 |
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