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Local Order of the Transition Metals for the Substitution (Co1−yCuy)2Al(OH)6Cl·nH2O (0 ⩽ y ⩽ 1) in a Copper-Aluminum-Layered Double Hydroxide-Like Phase

Published online by Cambridge University Press:  01 January 2024

Fabrice Leroux ,
El Mostafa Moujahid ,
Hervé Roussel ,
Anne-Marie Flank ,
Valérie Briois  and
Jean-Pierre Besse
Fabrice Leroux*
Affiliation:
Laboratoire des Matériaux Inorganiques, CNRS-UPRES-A no 6002, Université Blaise Pascal, 63177 Aubière cédex, France
El Mostafa Moujahid
Affiliation:
Laboratoire des Matériaux Inorganiques, CNRS-UPRES-A no 6002, Université Blaise Pascal, 63177 Aubière cédex, France
Hervé Roussel
Affiliation:
LURE, Centre Universitaire Paris Sud, Bât 209D, BP 34, 91898 Orsay cédex, France
Anne-Marie Flank
Affiliation:
LURE, Centre Universitaire Paris Sud, Bât 209D, BP 34, 91898 Orsay cédex, France
Valérie Briois
Affiliation:
LURE, Centre Universitaire Paris Sud, Bât 209D, BP 34, 91898 Orsay cédex, France
Jean-Pierre Besse
Affiliation:
Laboratoire des Matériaux Inorganiques, CNRS-UPRES-A no 6002, Université Blaise Pascal, 63177 Aubière cédex, France
*
*E-mail address of corresponding author: [email protected]
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Abstract

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The substitution in layered double hydroxide-like phases (LDH) of composition (Co1−y2+Cuy2+)2Al3+(OH)6Cl−⋅nH2O(0⩽y⩽1) was studied by X-ray diffraction and X-ray absorption spectroscopy. It was found that the lamellar character is maintained over the entire range of the substitution. The local order for the composition {Co2Al} is typical of brucite-like sheets, whereas segregation into small domains may explain the results obtained when the percentage of Cu atoms is increased. The {Cu2Al} end-member material presents a local order around the Cu atoms closely related to the botallackite structure as present in basic layered Cu salts, with the presence of two distinct Cu-Cu distances.

Keywords

Botallackite StructureLayered Double HydroxideX-ray Absorption Spectroscopy
Type
Research Article
Information
Clays and Clay Minerals , Volume 50 , Issue 2 , April 2002 , pp. 254 - 264
Copyright
Copyright © 2002, The Clay Minerals Society

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