Specific surface area and pore structure of allophanic soil clays
- 1 March 1977
- journal article
- Published by Mineralogical Society in Clay Minerals
- Vol. 12 (1) , 1-9
- https://doi.org/10.1180/claymin.1977.012.1.01
Abstract
Low temperature nitrogen adsorption has been used to study the external and internal structure of a number of allophanic soil clays. The results indicate that allophane, in addition to having pores in the intermediate size range (2–10 nm radius), contains micropores of < 1 nm radius. The occurrence of hitherto unreported micropores in allophanic clays has necessitated re-evaluation of the validity of specific surface area measurements.Keywords
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