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Journal of Colloid and Interface Science 261, 2 (2003) 244-254
Morphology and surface heterogeneities in synthetic goethites
Benedicte Prelot1, Frédéric Villiéras1, Manuel Pelletier1, Gilles Gérard1, Fabien Gaboriaud2, J.-J. Ehrhardt2, J. Perrone2, M. Fedoroff3, J. Jeanjean3, Grégory Lefèvre3, Léo Mazérolles3, Jean Louis Pastol3, J.C. Rouchaud4, C. Lindecker5
GdR PRACTIS ; GdR PARIS Collaboration(s)

In the framework on a study of the acido-basic and sorption properties of iron oxides, a thorough characterization of two types of goethite powders was performed in several laboratories joined in a common project. Chemical analysis by ICPAES; high-resolution SEM, TEM, and AFM observations; XRD with line width analysis; and argon and nitrogen sorption isotherms were used for that purpose. The main crystallographic faces of goethite particles could be identified as {001}, {101}, and {121}, and their abundance correlated with the distribution of low-pressure argon adsorption local isotherms. These results will be very useful for further studies on the relationship between surface reactivity in aqueous solution and orientation of solid surfaces.
1 :  LEM - Laboratoire Environnement et Minéralurgie
2 :  LCPME - Laboratoire de Chimie Physique et Microbiologie pour l'Environnement
3 :  CECM - Centre d'études de chimie métallurgique
4 :  ICMPE - Institut de Chimie et des Matériaux Paris-Est
5 :  IPNO - Institut de Physique Nucléaire d'Orsay
Chimie/Chimie théorique et/ou physique

Planète et Univers/Interfaces continentales, environnement

Sciences de l'environnement/Milieux et Changements globaux
Goethite – XRD – SEM – TEM – AFM – Gas adsorption – Morphology