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Formation Of Spinel Iron Oxide In Solution

Published online by Cambridge University Press:  28 February 2011

Jean Pierre Jolivet ,
Elisabeth Tronc ,
Philippe Belleville  and
Jacques Livage
Jean Pierre Jolivet
Affiliation:
Chimie de la Matière Condensée, CNRS URA 302, Université P. et M. Curie, 4 Place Jussieu, 75252 Paris Cedex 05 France.
Elisabeth Tronc
Affiliation:
Chimie de la Matière Condensée, CNRS URA 302, Université P. et M. Curie, 4 Place Jussieu, 75252 Paris Cedex 05 France.
Philippe Belleville
Affiliation:
Chimie de la Matière Condensée, CNRS URA 302, Université P. et M. Curie, 4 Place Jussieu, 75252 Paris Cedex 05 France.
Jacques Livage
Affiliation:
Chimie de la Matière Condensée, CNRS URA 302, Université P. et M. Curie, 4 Place Jussieu, 75252 Paris Cedex 05 France.
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Abstract

The alkalizing of aqueous mixtures Fe111 + xFe11 has been investigated at pH ≈ 8 for 0≤x≤0.5. Three composition zones have been observed. At x<O.l goethite was the only stable product. At 0.1≤x≤0.25 the early stage, characterized as mixed-valent protoferrihydrite, spontaneously transformed into nonstoichiometric magnetite. At x>0.25 the system, made of spinel particles, was homogeneous during all the evolution.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 180: Symposium A – Better Ceramics Through Chemistry IV , 1990 , 289
Copyright
Copyright © Materials Research Society 1990

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