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Readily-extractable hydroxyaluminium interlayers in clay- and silt-sized vermiculite

Published online by Cambridge University Press:  09 July 2018

V. C. Farmer ,
B. F. L. Smith ,
M. J. Wilson ,
P. J. Loveland  and
R. W. Payton
V. C. Farmer
Affiliation:
The Macaulay Land Use Research Institute, Craigiebuckler, Aberdeen AB9 2QJ
B. F. L. Smith
Affiliation:
The Macaulay Land Use Research Institute, Craigiebuckler, Aberdeen AB9 2QJ
M. J. Wilson
Affiliation:
The Macaulay Land Use Research Institute, Craigiebuckler, Aberdeen AB9 2QJ
P. J. Loveland
Affiliation:
Soil Survey and Land Research Centre, Silsoe Campus, Silsoe, Beds., MK45 4DT, UK
R. W. Payton
Affiliation:
Soil Survey and Land Research Centre, Silsoe Campus, Silsoe, Beds., MK45 4DT, UK
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Abstract

The dominant source of oxalate-soluble Al in the B horizon of a brown podzolic soil developed on andesite appears to be hydroxyaluminium interlayers in a dioctahedral vermiculite in the clay and silt fractions, of which the latter contributes most to the total extractable Al and fluoride reactivity of the whole soil. Cold sodium carbonate solutions extract as much interlayer Al as does oxalate, indicating that this fraction of the interlayer material is highly reactive, and sharply distinguished from more resistant interlayers which are also present.

Type
Research Article
Information
Clay Minerals , Volume 23 , Issue 3 , September 1988 , pp. 271 - 277
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1988

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