搜索结果: 1-11 共查到“地质学 Lepidocrocite”相关记录11条 . 查询时间(0.328 秒)
Effect of Phosphate on the Formation of Nanophase Lepidocrocite from Fe(II) Sulfate
Goethite Lepidocrocite Nanophase Phosphate Rietveld Analysis
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2011/12/6
Abstract: The effect of phosphate on the formation of Fe oxides from Fe(II) salts is important because phosphate is a ubiquitous anion in natural environments. For this reason, the products formed by ...
Effect of Phosphate on the Crystallization of Hematite, Goethite, and Lepidocrocite from Ferrihydrite
Crystallization Ferrihydrite Goethite Hematite Lepidocrocite Phosphate
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2011/12/7
Abstract: We investigated the crystallization of ferrihydrite prepared by hydrolysis of Fe(NO3)3 solutions containing phosphate. Crystallization was studied at different pH (3–9), temperatures (298, 3...
Reactions of copper and cadmium ions in aqueous solution with goethite, lepidocrocite, mackinawite, and pyrite
copper and cadmium irons goethite lepidocrocite mackinawite andpyrite
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2012/3/31
TheuptakeofCuandCdinaqueoussolutionbyinteractionwiththesurfacesofcare-
fullysynthesized?nelysizedparticlesofgoethite,lepidocrocite,mackinawite,andpyrite
wasmeasuredasafunctionofinitialmetalconcentra...
The Transformation of Lepidocrocite During Heating: A Magnetic and Spectroscopic Study
Dehydroxilation IR spectra Lepidocrocite Maghemite Phase transformation
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2011/12/29
Infrared (IR) spectroscopy, in combination with magnetic methods, was used to study the thermally induced transformation of synthetic lepidocrocite (γ-FeOOH) to maghemite (γ-Fe2O3). Magnetic analyses ...
The Influence of Aluminum on Iron Oxides. XV. Al-for-Fe Substitution in Synthetic Lepidocrocite
Aluminum Infrared spectroscopy Iron Lepidocrocite X-ray powder diffraction
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2012/1/4
Lepidocrocite samples, γ-FeOOH, containing 0–10 mole % Al-for-Fe substitution were synthesized at 15°C and pH 8 by oxidizing mixed FeCl2-AlCl3 solutions. The unit-cell parameters a, b, and c were meas...
Acid Dissolution of Akaganieite and Lepidocrocite: The Effect on Crystal Morphology
Akaganeite Dissolution Iron Lepidocrocite Morphology Transmission electron microscopy
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2012/1/9
The rate of dissolution of akaganéite in HCl increased with time over the bulk of the reaction leading to a sigmoid dissolution vs. time curve. The bulk of the dissolution of lepidocrocite could be de...
Influence of Chloride on the Formation of Iron Oxides from Fe(II) Chloride. II. Effect of [Cl] on the Formation of Lepidocrocite and its Crystallinity
Chloride Green rust Iron oxides Lepidocrocite Oxidation X-ray powder diffraction
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2012/2/3
Diffractograms of lepidocrocites formed from the oxidation of Fe(II) chloride solutions at pH 7 and 25∑C showed differential line broadening with (0k0) reflections being much sharper than (hk0) or (hk...
The Influence of Aluminum on Iron Oxides. VII. Substitution of Al for Fe in Synthetic Lepidocrocite
Aluminum Goethite Iron Lepidocrocite Substitution Synthesis
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2012/2/9
The presence of Al hydroxy species in solution during the synthesis of lepidocrocite had been previously found to influence the reaction towards goethite formation. However, under certain conditions, ...
The Occurrence of Lepidocrocite in Two Well-Drained Ontario Soils
Anaerobic Iron Goethite Lepidocrocite Soil
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2012/2/10
Lepidocrocite was identified associated with mica particles and in the clay fraction of two well-drained Ontario soils developed on a granite and a granite-gneiss. The occurrence of lepidocrocite is r...
The Influence of Silicate on the Transformation of Lepidocrocite to Goethite
Silicate Transformation Lepidocrocite Goethite
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2012/2/17
The mechanism of the transformation of lepidocrocite (γFeOOH) to goethite (αFeOOH) has previously been established and the effect of silicate on the transformation was investigated. Rather than comple...
The Transformation of Lepidocrocite to Goethite
Transformation Lepidocrocite Goethite
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2012/2/17
The conversion of lepidocrocite (γFeOOH) to its more stable polymorph, goethite (αFeOOH) was followed by observing changes in crystal morphology, oxalate solubility, surface area and X-ray diffraction...