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Layer Charge Characteristics of Smectites in Salt-Affected Soils in Alberta, Canada

Published online by Cambridge University Press:  28 February 2024

Connie K. Kohut  and
M. J. Dudas
Connie K. Kohut
Affiliation:
Department of Soil Science, University of Alberta, Edmonton Alberta, T6G 2E3
M. J. Dudas
Affiliation:
Department of Soil Science, University of Alberta, Edmonton Alberta, T6G 2E3
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Abstract

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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 (—)/O10(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.

Keywords

Layer chargeSalinitySmectite
Type
Research Article
Information
Clays and Clay Minerals , Volume 43 , Issue 1 , February 1995 , pp. 78 - 84
Copyright
Copyright © 1995, The Clay Minerals Society

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