Investigation on the Oxidation Mechanism of Cobalt Hydroxide to Cobalt Oxyhydroxide / Ramesh, Thimmasandra Narayan in Industrial & engineering chemistry research, Vol. 49 N° 4 (Fevrier 2010)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 49 N° 4 (Fevrier 2010) . - pp 1530–1533 Titre : Investigation on the Oxidation Mechanism of Cobalt Hydroxide to Cobalt Oxyhydroxide Type de document : texte imprimé Auteurs : Ramesh, Thimmasandra Narayan, Auteur Année de publication : 2010 Article en page(s) : pp 1530–1533 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Oxidation mechanism Hydroxide Cobalt oxyhydroxide. Résumé : Cobalt hydroxide and cobalt oxyhydroxide derive their crystal structure from brucite mineral. Cobalt hydroxide crystallizes in hexagonal 1H polytype while cobalt oxyhydroxide in rhombohedral symmetry. In spite of the isostructural relationship between cobalt hydroxide and oxyhydroxide, we observe different symmetries. Hexagonal and rhombohedral polytypes are related to each other by a simple translation vector. Translation of AC layers by (1/3, 2/3, 1) and (2/3, 1/3, 1) with respect to each other generates the 3R polytype. Careful evaluation of the X-ray powder diffraction (PXRD) patterns of cobalt oxyhydroxide reveals the exact stacking sequence to be AC CB BA. The structural transformation of cobalt hydroxide to cobalt oxyhydroxide is reported. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901714v [article] Investigation on the Oxidation Mechanism of Cobalt Hydroxide to Cobalt Oxyhydroxide [texte imprimé] / Ramesh, Thimmasandra Narayan, Auteur . - 2010 . - pp 1530–1533. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 4 (Fevrier 2010) . - pp 1530–1533 Mots-clés : Oxidation mechanism Hydroxide Cobalt oxyhydroxide. Résumé : Cobalt hydroxide and cobalt oxyhydroxide derive their crystal structure from brucite mineral. Cobalt hydroxide crystallizes in hexagonal 1H polytype while cobalt oxyhydroxide in rhombohedral symmetry. In spite of the isostructural relationship between cobalt hydroxide and oxyhydroxide, we observe different symmetries. Hexagonal and rhombohedral polytypes are related to each other by a simple translation vector. Translation of AC layers by (1/3, 2/3, 1) and (2/3, 1/3, 1) with respect to each other generates the 3R polytype. Careful evaluation of the X-ray powder diffraction (PXRD) patterns of cobalt oxyhydroxide reveals the exact stacking sequence to be AC CB BA. The structural transformation of cobalt hydroxide to cobalt oxyhydroxide is reported. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901714v

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