Layer Charge Characteristics of Smectites in Salt-Affected Soils in Alberta, Canada
| Autor: | M. J. Dudas, Connie K. Kohut |
|---|---|
| Rok vydání: | 1995 |
| Předmět: |
chemistry.chemical_classification
Intercalation (chemistry) Soil Science Salt (chemistry) Mineralogy Weathering Electric charge Grain size chemistry Geochemistry and Petrology Soil water Earth and Planetary Sciences (miscellaneous) Clay minerals Layer (electronics) Geology Water Science and Technology |
| Zdroj: | Clays and Clay Minerals. 43:78-84 |
| ISSN: | 0009-8604 |
| Popis: | The layer charge characteristics of expanding phyllosilicates in four salt-affected soils in Alberta, Canada were investigated using X-ray diffraction analysis of alkylammonium saturated samples. The layer charge was found to be lower and more heterogeneous than previously reported for non-saline Alberta soils, with the mean layer charge ranging between 0.261 to 0.339 tool (-)/O~o(OH)2. Layer charge characteristics varied inconsistently with location, depth and particle size, likely the result of both different origins and weathering processes. Different degrees of K depletion from the micaceous component after equilibration with alkylammonium compounds may also account for some variability between samples. Extreme broadening and essential disappearance of smectite diffraction maxima was noted for some samples after intercalation with alkylammonium cations of all carbon chain lengths, indicating unusual alteration of the layer charge characteristics in some salt-affected soils. |
| Databáze: | OpenAIRE |
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