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Composition, stabilization, and light absorption of Fe(II)Fe(III) hydroxy-carbonate (‘green rust’)
Abstract
The chemical composition of the pyroaurite-type compound Fe(II)Fe(III) hydroxy-carbonate (‘green rust’) synthesised from freshly precipitated ferrihydrite and Fe(II) chloride solution at pH 7.0 (‘induced hydrolysis’) was determined. The compound was nearly stoichiometric, with the formula the Fe(II):Fe(III) ratio being independent of the Fe(II):Fe(III) ratio in the initial reaction mixture. It shows all the XRD peaks reported for this compound. Visible-near IR shows a broad peak at 650 nm which is ascribable to intervalence charge transfer and therefore the absorbance maximum decreases with increasing degree of oxidation. Wetting the material with compounds containing hydroxyl groups (such as glycerol or glucose) retards the oxidation of the otherwise very oxidation-sensitive compound. Similar polar organic compounds may stabilize the Fe(II)Fe(III) hydroxy-carbonate in wet soils. The importance of the green rust phase as an intermediate in the formation and transformation reactions of oxides and oxyhydroxides of iron in natural environments should not be ignored.
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Cited by
Fredrickson, J. K., Zachara, J. M., Kennedy, D. W., Dong, H., Onstott, T. C., Hinman, N. W., & Li, S.-M. (1998) · Geochimica et Cosmochimica Acta · doi:10.1016/s0016-7037(98)00243-9 · Cited by 807
Anaerobic Corrosion of Granular Iron: Measurement and Interpretation of Hydrogen Evolution Rates
Reardon, E. J. (1995) · Environmental Science & Technology · doi:10.1021/es00012a008 · Cited by 295
The anionic species competition in iron aqueous corrosion: Role of various green rust compounds
Refait, P., Drissi, S. H., Pytkiewicz, J., & Génin, J.-M. R. (1997) · Corrosion Science · doi:10.1016/s0010-938x(97)00076-0 · Cited by 107
Formation of Hydroxysulphate Green Rust 2 as a Single Iron(II-III) Mineral in Microbial Culture
Zegeye, A., Ona-Nguema, G., Carteret, C., Huguet, L., Abdelmoula, M., & Jorand, F. (2005) · Geomicrobiology Journal · doi:10.1080/01490450500248960 · Cited by 70
ZEGEYE, A., MUSTIN, C., & JORAND, F. (2010) · Geobiology · doi:10.1111/j.1472-4669.2010.00238.x · Cited by 49
Metadata
- Authors
- Hansen, H. C. B.
- Venue
- Clay Minerals
- Publisher
- Mineralogical Society
- Published
- 1989-12
- Volume
- 24
- Issue
- 4
- Pages
- 663-669
- ISSN
- 0009-8558 (ISSN-L)
- 1471-8030
- OpenAlex
- W2142909483
- Cited by
- 169
- References
- 0
- FWCI
- 2.13
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: Composition, stabilization, and light absorption of Fe(II)Fe(III) hydroxy-carbonate (‘green rust’). https://app.cochat.ai/papers/10.1180/claymin.1989.024.4.08
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- Hansen, H. C. B. (1989). Composition, stabilization, and light absorption of Fe(II)Fe(III) hydroxy-carbonate (‘green rust’). Clay Minerals. https://doi.org/10.1180/claymin.1989.024.4.08
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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