Journal ArticleDOI
Mechanism of the low temperature oxidation of synthetic magnetites
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The diffusion coefficients of Fe are in the range 0.8 to 2.1 × 10−15 cm2/sec and decrease with the increasing isomorphous substitution of Co, Ni and Zn for Fe(II) in the magnetite as discussed by the authors.About:
This article is published in Journal of Inorganic and Nuclear Chemistry.The article was published on 1977-01-01. It has received 125 citations till now. The article focuses on the topics: Isomorphous substitution & Maghemite.read more
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Journal ArticleDOI
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.
Book ChapterDOI
Characterization of Aqueous Colloids by Their Electrical Double-Layer and Intrinsic Surface Chemical Properties
TL;DR: In this paper, the development of surface charge and potential, the zeta potential of the solid, the conductivity of the sol, electrolyte adsorption densities, and related properties are modeled.
Journal ArticleDOI
Magnetite Fe3O4 Nanocrystals: Spectroscopic Observation of Aqueous Oxidation Kinetics†
TL;DR: In this article, the temperature dependence of the diffusion constant is described by an Arrhenius equation with an activation energy of 21.0 kcal/mol, and a careful search for photooxidation establishes a small upper limit for the possible increase in the diffusion constants under illumination.
Journal ArticleDOI
Reduction of U(VI) to U(IV) on the surface of magnetite
TL;DR: In this article, the interaction of U(VI) with natural magnetite has been studied using X-ray photoelectron spectroscopy (XPS) and secondary ion mass spectrometry (SIMS).
Journal ArticleDOI
Phase transformations of iron oxides, oxohydroxides, and hydrous oxides in aqueous media
Miguel A. Blesa,Egon Matijević +1 more
TL;DR: In this paper, the authors reviewed the available information regarding the pathways of processes leading to precipitation of iron (hydrous) oxides in aqueous salt solutions and discussed the importance of the early hydrolysis stages in determining the nature and the morphology of the solid phases.
References
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Book
The mathematics of diffusion
TL;DR: Though it incorporates much new material, this new edition preserves the general character of the book in providing a collection of solutions of the equations of diffusion and describing how these solutions may be obtained.
Journal ArticleDOI
Mechanism of Oxidation of Magnetite to γ -Fe 2 O 3
TL;DR: In this paper, it was shown that the rate of oxidation of magnetite crystals smaller than about 0.2µ to γ-Fe2O3 is controlled by the diffusion of iron cations.
Journal ArticleDOI
Effect of the deviation from stoichiometry on cation self-diffusion and isotope effect in wüstite, Fe1-xO
W.K. Chen,N.L. Peterson +1 more
TL;DR: In this paper, the authors measured the temperature dependence of the cation diffusivity in Fe 0.94 O and showed that the diffusion increases slightly at 1200°C, decreases at 802°C with an increase in x, and is insensitive to change in x at 1003°C.
Journal ArticleDOI
The oxidation of magnetite and related spinels. Constitution of gamma ferric oxide
I. David,A. J. E. Welch +1 more