Chemistry of illite/smectite and end-member illite
Clays and Clay Minerals
By: J. Srodon, D.J. Morgan, E.V. Eslinger, D. D. Eberl, and M.R. Karlinger
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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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