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dc.contributor.author
Wörle, Michael
dc.contributor.author
Krumeich, Frank
dc.date.accessioned
2021-03-25T15:32:34Z
dc.date.available
2021-02-10T13:24:09Z
dc.date.available
2021-02-12T10:32:56Z
dc.date.available
2021-03-25T15:32:34Z
dc.date.issued
2021-02-11
dc.identifier.issn
1521-3749
dc.identifier.issn
0044-2313
dc.identifier.other
10.1002/zaac.202000377
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/468861
dc.description.abstract
In this comparative study, two samples with a slightly different oxygen : metal ratio have been characterized by various electron microscopy methods and by single-crystal and powder X-ray diffraction (XRD). A reasonably good fit to the experimental powder XRD patterns could be achieved by Rietveld refinement for both samples Nb8W9O47 and Nb7W10O47.5 using the structural models of Nb6.7W10.3O47 and Nb8W9O47 both obtained from X-ray crystal structure analysis. HRTEM investigations confirm that Nb8W9O47 crystallizes as a pure phase in the well-known threefold superstructure of the tetragonal tungsten bronze type (TTB). In contrast, a more complex real structure was found for the sample Nb7W10O47.5 with small domains of Nb4W7O31 appearing besides large ones of Nb8W9O47 and in addition extended TTB-based areas with short-range order only. The diffuse scattering caused by this disorder is easily detected in the electron diffraction pattern but does not affect the Rietveld refinement of the powder XRD patterns. However, on the basis of powder diffraction experiments, it is clearly possible to distinguish between the above compounds and the hypothetical, but non-existing compound "Nb18W16O93", a composition recently postulated for battery materials.
en_US
dc.language.iso
en
en_US
dc.publisher
Wiley
en_US
dc.title
On the structural complexity of tetragonal tungsten bronze type niobium tungsten oxides
en_US
dc.type
Journal Article
dc.date.published
2020-11-11
ethz.journal.title
Zeitschrift für anorganische und allgemeine Chemie
ethz.journal.volume
647
en_US
ethz.journal.issue
2-3
en_US
ethz.journal.abbreviated
Z. Anorg. Allg. Chem.
ethz.pages.start
98
en_US
ethz.pages.end
106
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Weinheim
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02020 - Dep. Chemie und Angewandte Biowiss. / Dep. of Chemistry and Applied Biosc.::02024 - Small Molecule Crystallography Center
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02020 - Dep. Chemie und Angewandte Biowiss. / Dep. of Chemistry and Applied Biosc.::02024 - Small Molecule Crystallography Center
ethz.date.deposited
2021-02-10T13:24:14Z
ethz.source
WOS
ethz.eth
yes
en_US
ethz.availability
Metadata only
en_US
ethz.rosetta.installDate
2021-03-25T15:32:42Z
ethz.rosetta.lastUpdated
2022-03-29T05:59:53Z
ethz.rosetta.versionExported
true
ethz.COinS
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