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Positive and negative monoclinic deformation of corundum-type trigonal crystal structures of M2O3 metal oxides

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cris.lastimport.scopus2024-02-12T19:30:51Z
dc.abstract.enThe crystal structures of several transition metal oxides, Ti2O3, V2O3, Cr2O3, Al2O3 and αlpha-Fe2O3, are studied using synchrotron radiation X-ray powder diffraction. The observed angular dependence of the integral breadths is described by two models: (i) the distorted corundum-type structure model described by the space group C2/c and (ii) the Stephens model of anisotropic Bragg peak broadening. These two models are shown to be equivalent. Ti2O3, V2O3 and Cr2O3 show a positive distortion which is related to the possible metal--metal bond suggested by Goodenough in the literature (the deformation leads to shorter metal--metal distances) whereas Al2O3 and αlpha-Fe2O3 show a negative distortion which leads to relatively longer metal--metal distances.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorFabrykiewicz, Piotr
dc.contributor.authorFauth, François
dc.contributor.authorPrzeniosło, Radosław
dc.contributor.authorSosnowska, Izabela
dc.date.accessioned2024-01-25T17:16:26Z
dc.date.available2024-01-25T17:16:26Z
dc.date.issued2018
dc.description.financeNie dotyczy
dc.identifier.doi10.1107/S2052520618014968
dc.identifier.issn2052-5206
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/116571
dc.languageeng
dc.pbn.affiliationphysical sciences
dc.relation.ispartofActa Crystallographica Section B: Structural Science, Crystal Engineering and Materials
dc.rightsClosedAccess
dc.sciencecloudnosend
dc.subject.ensynchrotron powder diffraction peak broadening metal-metal bond corundum-type structure Ti2O3 tistarite V2O3 karelianite Cr2O3 eskolaite Al2O3 corundum [alpha]-Fe2O3 hematite
dc.titlePositive and negative monoclinic deformation of corundum-type trigonal crystal structures of M2O3 metal oxides
dc.typeJournalArticle
dspace.entity.typePublication