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Effect of Silicate Species on the Transformation of Ferrihydrite into Goethite and Hematite in Alkaline Media
Abstract
The transformation of ferrihydrite to goethite and/or hematite in alkaline media is strongly retarded by the presence of silicate species. These species probably stabilize ferrihydrite by adsorbing on the particles of ferrihydrite and linking them into an immobile network. At concentrations low enough for the transformation to proceed, silicate species promote the formation of hematite and hinder the nucleation of goethite. The presence of silicate species modifies the morphology of both reaction products. Hematite forms ellipsoidal single crystals, commonly displaying outgrowths of goethite. Silicate species in solution appear to enhance the development of the (021) faces of goethite, probably by preferential adsorption on these faces; at high levels of silicate species, goethite crystals adopt a pseudohexagonal habit. This morphology has not been observed previously for goethite.
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Citations
Cited by
Occurrence and Constitution of Natural and Synthetic Ferrihydrite, a Widespread Iron Oxyhydroxide
Jambor, J. L., & Dutrizac, J. E. (1998) · Chemical Reviews · doi:10.1021/cr970105t · Cited by 916
Zachara, J. M., Kukkadapu, R. K., Fredrickson, J. K., Gorby, Y. A., & Smith, S. C. (2002) · Geomicrobiology Journal · doi:10.1080/01490450252864271 · Cited by 364
Metal Interactions with Microbial Biofilms in Acidic and Neutral pH Environments
Ferris, F. G., Schultze, S., Witten, T. C., Fyfe, W. S., & Beveridge, T. J. (1989) · Applied and Environmental Microbiology · doi:10.1128/aem.55.5.1249-1257.1989 · Cited by 272
Preterrestrial aqueous alteration of the Lafayette (SNC) meteorite
Treiman, A. H., Barrett, R. A., & Gooding, J. L. (1993) · Meteoritics · doi:10.1111/j.1945-5100.1993.tb00251.x · Cited by 223
Kukkadapu, R. K., Zachara, J. M., Fredrickson, J. K., & Kennedy, D. W. (2004) · Geochimica et Cosmochimica Acta · doi:10.1016/j.gca.2003.12.024 · Cited by 192
Metadata
- Authors
- Cornell, R. M., Giovanoli, R., & Schindler, P. W.
- Venue
- Clays and Clay Minerals
- Publisher
- Cambridge University Press (CUP)
- Published
- 1987-02
- Volume
- 35
- Issue
- 1
- Pages
- 21-28
- ISSN
- 0009-8604 (ISSN-L)
- 1552-8367
- OpenAlex
- W2017598227
- Cited by
- 223
- References
- 0
- FWCI
- 5.90
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: Effect of Silicate Species on the Transformation of Ferrihydrite into Goethite and Hematite in Alkaline Media. https://app.cochat.ai/papers/10.1346/ccmn.1987.0350103
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- Cornell, R. M., Giovanoli, R., & Schindler, P. W. (1987). Effect of Silicate Species on the Transformation of Ferrihydrite into Goethite and Hematite in Alkaline Media. Clays and Clay Minerals. https://doi.org/10.1346/ccmn.1987.0350103
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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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