• journal_title：Clays and Clay Minerals
• Contributor：Fabrice Leroux ; El Mostafa Moujahid ; Hervé Roussel ; Anne-Marie Flank ; Valérie Briois ; Jean-Pierre Besse
• Publisher：Clay Minerals Society
• Date：2002-
• Format：text/html
• Language：en
• journal_abbrev：Clays and Clay Minerals
• issn：0009-8604
• volume：50
• issue：2
• firstpage：254
• section：Articles

The substitution in layered double hydroxide-like phases (LDH) of composition (Co²⁺_1−yCu_y²⁺)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.