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This article in SSSAJ

  1. Vol. 48 No. 6, p. 1462-1463
     
    Received: Feb 10, 1984
    Published: Nov, 1984


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doi:10.2136/sssaj1984.03615995004800060054x

The Influence of Aluminum on Iron Oxides: XI. Aluminum-Substituted Maghemite in Soils and Its Formation1

  1. U. Schwertmann and
  2. H. Fechter2

Abstract

Abstract

Maghemites (γ-Fe2O3) from highly weathered soils had unit cell parameters significantly lower than pure maghemites. This was due to Al for Fe substitution in the cubic structure. Al-substituted maghemites were synthesized by heating soil and synthetic Al-substituted goethites with sucrose and synthetic Al-substituted magnetites. Formation of Al-substituted maghemites in soils by fire is, therefore, postulated.

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