Please use this identifier to cite or link to this item: http://dx.doi.org/10.14279/depositonce-7878
Main Title: Verteilung und Valenz der Kationen in Spinellsystemen mit Eisen und Vanadium, VIII
Subtitle: Gitterkonstanten, Mößbauer-Spektren und elektronische Eigenschaften der Mischkristallreihe FeV2O4—Fe3O4
Translated Title: Distribution and Valence of the Cations in Spinel Systems with Iron and Vanadium, VIII
Translated Subtitle: Lattice Constants, Mössbauer Spectra and Electronic Properties of the Solid Solution FeV2O4—Fe3O4
Author(s): Riedel, Erwin
Kähler, Jörg
Pfeil, Norbert
Type: Article
Language Code: de
Abstract: From lattice constants and Mössbauer data the valence distribution and an energy-level diagram of the spinel system Fe(FexV2-x)O4 have been derived. In the range 0.3 ≦ χ ≦ 1.5 the transition from normal to inverse spinels takes place. The Mößbauer spectra with 1.0 ≦ χ ≦ 2.0 consist of two sets of sextets corresponding to tetrahedral and octahedral sites. Typical values of isomer shift and internal magnetic field strength due to the different environments of the iron ion result from the superimposed sextets of the octahedral site pattern. Neighbouring V ions enhance the conduction electron density and diminish the strength of the magnetic interaction. Mößbauer data, Seebeck coefficients and activation energies lead to a model of both tetrahedral and octahedral conduction based on charge hopping. For Fe1,9V1,1 O4 there exists only one iron species.
URI: https://depositonce.tu-berlin.de//handle/11303/8749
http://dx.doi.org/10.14279/depositonce-7878
Issue Date: 1989
Date Available: 2-Jan-2019
DDC Class: 540 Chemie und zugeordnete Wissenschaften
Subject(s): Kationen
Spinellsystem
Valenz
Verteilung
License: https://creativecommons.org/licenses/by-nc-nd/3.0/
Journal Title: Zeitschrift für Naturforschung B
Publisher: De Gruyter
Publisher Place: Berlin
Volume: 44
Issue: 11
Publisher DOI: 10.1515/znb-1989-1118
Page Start: 1427
Page End: 1437
EISSN: 1865-7117
ISSN: 0932-0776
Appears in Collections:FG Anorganische Chemie - Festkörper- und Materialchemie » Publications

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