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Nanocubes or Nanorhombohedra? Unusual Crystal Shapes of Corundum-Type Indium Oxide

Gurlo, Aleksander and Lauterbach, Stefan and Miehe, Gerhard and Kleebe, Hans-Joachim and Riedel, Ralf (2008):
Nanocubes or Nanorhombohedra? Unusual Crystal Shapes of Corundum-Type Indium Oxide.
112, In: Journal of Physical Chemistry C, (25), pp. 9209-9213. ACS, ISSN 1932-7447,
[Article]

Abstract

Sol−gel processing via the modified nonalkoxide route resulted in the formation of nanocrystals of the corundum-type In2O3 polymorph, which revealed characteristic rhombohedra with a morphology very close to cubes. Because the cubic bixbyite-type In2O3 polymorph is more abundant under ambient conditions, the seemingly cube-shaped morphology might confuse the experimentalist. As shown by transmission electron microscopy, this morphology does not reflect any relation to a cubic structure but appears accidentally with form {012} at a specific axis ratio of corundum-type structures. The pseudocubic particles have also been reported for α-Fe2O3, also in this case the pseudocubic nanorhombohedra are terminated by {012} facets.

Item Type: Article
Erschienen: 2008
Creators: Gurlo, Aleksander and Lauterbach, Stefan and Miehe, Gerhard and Kleebe, Hans-Joachim and Riedel, Ralf
Title: Nanocubes or Nanorhombohedra? Unusual Crystal Shapes of Corundum-Type Indium Oxide
Language: English
Abstract:

Sol−gel processing via the modified nonalkoxide route resulted in the formation of nanocrystals of the corundum-type In2O3 polymorph, which revealed characteristic rhombohedra with a morphology very close to cubes. Because the cubic bixbyite-type In2O3 polymorph is more abundant under ambient conditions, the seemingly cube-shaped morphology might confuse the experimentalist. As shown by transmission electron microscopy, this morphology does not reflect any relation to a cubic structure but appears accidentally with form {012} at a specific axis ratio of corundum-type structures. The pseudocubic particles have also been reported for α-Fe2O3, also in this case the pseudocubic nanorhombohedra are terminated by {012} facets.

Journal or Publication Title: Journal of Physical Chemistry C
Volume: 112
Number: 25
Publisher: ACS
Divisions: 11 Department of Materials and Earth Sciences > Earth Science > Geo-Material-Science
11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids
11 Department of Materials and Earth Sciences > Earth Science
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 16 Apr 2012 09:17
Official URL: http://dx.doi.org/10.1021/jp800823g
Identification Number: doi:10.1021/jp800823g
Funders: The work was financially supported by the Fonds der Chemischen Industrie, Frankfurt, Germany.
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