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Patureau, P., Dessapt, R., Petit, P.-E., Landrot, G., Payen, C. & Deniard, P. (2019) Evidence of Wolframite-Type Structure in Ultrasmall Nanocrystals with a Targeted Composition MnWO4. Inorganic Chemistry, 58 7822–7827.
Added by: Richard Baschera (2019-07-15 14:27:14) Last edited by: Richard Baschera (2019-07-17 09:17:51) |
| Type de référence: Article DOI: 10.1021/acs.inorgchem.9b00464 Clé BibTeX: Patureau2019 Voir tous les détails bibliographiques  |
Catégories: IMN, MIOPS Créateurs: Deniard, Dessapt, Landrot, Patureau, Payen, Petit Collection: Inorganic Chemistry |
Consultations : 1/341
Indice de consultation : 4% Indice de popularité : 1% |
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Here, we report a study of white-ochre powders with targeted composition MnWO4 prepared via a coprecipitation method. Through X-ray total scattering combined with pair distribution function analysis and Rietveld refinement of X-ray diffraction data, we find that their crystal structure is similar to that of bulk-MnWO4, despite a mean crystallite size of 1.0-1.6 nm and a significant deviation of the average chemical composition from MnWO4. The chemical formula derived from elemental and thermogravimetric analyses is Mn0.8WO3.6(OH)(0.4)center dot 3H(2)O. X-ray absorption and magnetic susceptibility measurements show that Mn and W have the same oxidation states as in MnWO4. No magnetic ordering or spin glass or superparamagnetic behavior is observed above 2 K, unlike in the case of MnWO4 nanocrystals having a mean size higher than 10 nm.
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