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

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Abstract:

- The substitution in layered double hydroxide-like phases (LDH) of composition (Co2+1-y Cu2+y)2Al3+(OH)6Cl ­· n H2O (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 STRUCTURE; LAYERED DOUBLE HYDROXIDE; X-RAY ABSORPTION SPECTROSCOPY.

Document Type: Research Article

DOI: http://dx.doi.org/10.1346/000986002760832856

Publication date: April 1, 2002

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  • The JOURNAL publishes articles of interest to the international community of clay scientists, including but not limited to areas in mineralogy, crystallography, geology, geochemistry, sedimentology, soil science, agronomy, physical chemistry, colloid chemistry, ceramics, petroleum engineering, foundry engineering, and soil mechanics. Clays and Clay Minerals exists to disseminate to its worldwide readership the most recent developments in all of these aspects of clay materials. Manuscripts are welcome from all countries.

    Clays and Clay Minerals is the official publication of The Clay Minerals Society.

    The Editor-in-Chief is Professor Joseph W. Stucki jstucki@illinois.edu

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