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This article in SSSAJ

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

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

  1. U. Schwertmann and
  2. H. Fechter2



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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