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Please use this identifier to cite or link to this item: http://apo.ansto.gov.au/dspace/handle/10238/1716

Title: An investigation of goethite-seeded Al(OH)(3) precipitation using in situ x-ray diffraction and rietveld-based quantitative phase analysis.
Authors: Webster, NAS
Madsen, IC
Loan, MJ
Knott, RB
Naim, F
Wallwork, KS
Kimpton, JA
Keywords: X-Ray Diffraction
Goethite
Precipitation
Phase Studies
Crystal Structure
Gibbsite
Issue Date: Jun-2010
Publisher: Wiley-Blackwell
Citation: Webster, N. A. S., Madsen, I. C., Loan, M. J., Knott, R. B., Naim, F., Wallwork, K. S., et al. (2010). An investigation of goethite-seeded Al(OH)(3) precipitation using in situ x-ray diffraction and rietveld-based quantitative phase analysis. Journal of Applied Crystallography, 43, 466-472.
Abstract: An in situ X-ray diffraction investigation of goethite-seeded Al(OH)3 precipitation from synthetic Bayer liquor at 343 K has been performed. The presence of iron oxides and oxyhydroxides in the Bayer process has implications for alumina reversion, which causes significant process losses through unwanted gibbsite precipitation, and is also relevant for the nucleation and growth of scale on mild steel process equipment. The gibbsite, bayerite and nordstrandite polymorphs of Al(OH)3 precipitated from the liquor; gibbsite appeared to precipitate first, with subsequent formation of bayerite and nordstrandite. A Rietveld-based approach to quantitative phase analysis was implemented for the determination of absolute phase abundances as a function of time, from which kinetic information for the formation of the Al(OH)3 phases was determined. © 2010, Wiley-Blackwell. The definitive version is available at www3.interscience.wiley.com
URI: http://dx.doi.org/10.1107/S0021889810008484
http://apo.ansto.gov.au/dspace/handle/10238/1716
ISSN: 0021-8898
Appears in Collections:Journal Articles

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