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Effects of iron oxidation state on the specific surface area of nontronite



Effects of iron oxidation state on the specific surface area of nontronite



Clays and Clay Minerals 37(6): 547-552



The effect of Fe oxidation state on the specific surface area, Sm, of nontronite was studied using the <2- mu m, Na+-saturated fraction of the SWa-1 and Garfield nontronite references clays. The reduction of structural Fe3+ in the octahedral sheet of the nontronite decreased Sm as measured by the adsorption of 2-ethoxyethanol (ethylene glycol-monoethyl ether, EGME). The 'swellability' in water of the nontronite also decreased during reduction.

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Accession: 001818537

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DOI: 10.1346/ccmn.1989.0370607


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