Journal ArticleDOI
Disorder and diffusional motion of cations in magnetite, Fe3−δO4, studied by Mössbauer spectroscopy at high temperatures
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In this article, the Mossbauer spectra of magnetite, Fe 3−δ O 4, have been measured at high temperatures (up to 1400°C) as a function of oxygen partial pressure, p O 2.About:
This article is published in Journal of Physics and Chemistry of Solids.The article was published on 1993-08-01. It has received 28 citations till now. The article focuses on the topics: Magnetite & Mössbauer spectroscopy.read more
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Iron oxide surfaces
TL;DR: In this paper, a review of the current status of knowledge regarding the surfaces of the iron oxides, magnetite (Fe3O4), maghemite (γ-Fe2O3), haematite (α-Fe 2O3, and wustite (fe1−xO) is reviewed.
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Diffusion in Oxides
James A. Van Orman,K. L. Crispin +1 more
TL;DR: The diffusion properties of non-silicate oxide minerals have been studied intensively, using a wide range of experimental, analytical and computational approaches as mentioned in this paper, and particular attention has been devoted to deciphering the atomic-level mechanisms involved in diffusion.
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Point defects and cation tracer diffusion in (CrxFe1 − x)3 − δO4 spinels
TL;DR: In this article, the deviation from stoichiometry in (CrxFe1−x)3−δO4 was measured by thermogravimetry at 1200 °C as a function of oxygen activity, aO2, and cationic composition.
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Diffusive motion of antiphase domain boundaries in Fe3O4 films
TL;DR: In this paper, it was shown that the antiphase domain boundaries anneal out via a diffusive mechanism at relatively low temperatures, and a linear relationship has been obtained for the logarithm of the domain size versus the inverse of the growth temperature.
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Modeling of iron diffusion in the iron oxides magnetite and hematite with variable stoichiometry
TL;DR: In this paper, the vacancy model of diffusion is applied to magnetite and hematite, and mathematical expressions for the iron flux in the lattice-fixed frame of reference, as a function of the defect structure, are presented.
References
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Journal ArticleDOI
Electronic conductivity and transition point of magnetite (“Fe3O4”)
E.J.W. Verwey,P.W. Haayman +1 more
TL;DR: In this article, an einigen gesinterten Stabchen aus Magnetit (Fe 3 O 4 ) wird festgestellt dass sich der elektrische Widerstand bei Uberschreitung eines Umwandlungpunktes in der Umgebung von 100-200°K sprunghaft andert.
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The System Iron—Oxygen. II. Equilibrium and Thermodynamics of Liquid Oxide and Other Phases
L. S. Darken,R. W. Gurry +1 more
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Resonance Absorption of Nuclear Gamma Rays and the Dynamics of Atomic Motions
K. S. Singwi,A. Sjölander +1 more
TL;DR: In this paper, the theory of resonance absorption of nuclear gamma rays is generalized for an arbitrary system of interacting particles by expressing the relevant transition probability in terms of a space-time self-correlation function; thus relating the resonance line shape to the incoherent differential scattering cross section for slow neutrons.
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Defects and Cation Diffusion in Magnetite (I)
R. Dieckmann,H. Schmalzried +1 more
TL;DR: In this article, the tracer diffusivities of Fe in almost single crystalline magnetite Fe3-ΔO4 have been measured as a function of temperature and oxygen partial pressure.
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Mössbauer spectroscopy of stoichiometric and non-stoichiometric magnetite
J.M. Daniels,A. Rosencwaig +1 more
TL;DR: In this paper, it was shown that the fast electron hopping process in magnetite is essentially a pair-localized phenomenon, with the non-paired octahedral Fe 3+ ions not participating in the hopping process.