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Clays and Clay Minerals

, Volume 50, Issue 2, pp 254–264 | Cite as

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

  • Fabrice LerouxEmail author
  • El Mostafa Moujahid
  • Hervé Roussel
  • Anne-Marie Flank
  • Valérie Briois
  • Jean-Pierre Besse
Article

Abstract

The substitution in layered double hydroxide-like phases (LDH) of composition (\(\matrix{ {{{\left( {{\rm{Co}}_{1 - y}^{2 + }{\rm{Cu}}_y^{2 + }} \right)}_2}{\rm{A}}{{\rm{l}}^{3 + }}{{\left( {{\rm{OH}}} \right)}_6}{\rm{C}}{{\rm{l}}^ - } \cdot n{{\rm{H}}_{\rm{2}}}{\rm{O}}} & {\left( {0 \leqslant y \leqslant 1} \right)} \cr } \))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 alocal 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.

Key Words

Botallackite Structure Layered Double Hydroxide X-ray Absorption Spectroscopy 

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Copyright information

© The Clay Minerals Society 2002

Authors and Affiliations

  • Fabrice Leroux
    • 1
    Email author
  • El Mostafa Moujahid
    • 1
  • Hervé Roussel
    • 2
  • Anne-Marie Flank
    • 2
  • Valérie Briois
    • 2
  • Jean-Pierre Besse
    • 1
  1. 1.Laboratoire des Matériaux Inorganiques, CNRS-UPRES-A no 6002Université Blaise PascalAubière cédexFrance
  2. 2.LURECentre Universitaire Paris SudOrsay cédexFrance

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