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The Influence of Aluminum on Iron Oxides: XI. Aluminum‐Substituted Maghemite in Soils and Its Formation
Author(s) -
Schwertmann U.,
Fechter H.
Publication year - 1984
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1984.03615995004800060054x
Subject(s) - maghemite , soil water , aluminium , magnetite , chemistry , mineralogy , salt (chemistry) , chemical engineering , materials science , geology , metallurgy , hematite , soil science , organic chemistry , engineering
Maghemites (γ‐Fe 2 O 3 ) 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.