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Powder X-Ray Diffraction Study of the Hydration and Leaching Behavior of Nontronite

Published online by Cambridge University Press:  01 January 2024

Nicola V. Y. Scarlett ,
Mark Raven  and
Ian Madsen
Nicola V. Y. Scarlett*
Affiliation:
CSIRO Process Science and Engineering, Box 312, Clayton South, Victoria, 3169, Australia
Mark Raven
Affiliation:
CSIRO Land & Water, Waite Rd, Urrbrae, South Australia, 5064, Australia
Ian Madsen
Affiliation:
CSIRO Process Science and Engineering, Box 312, Clayton South, Victoria, 3169, Australia
*
* E-mail address of corresponding author: [email protected]
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Abstract

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Nontronite is a significant component of commercially important nickel laterite ores. Its behavior during high-pressure acid leaching of such ores may have an impact upon the efficiency of the process. The present study was conducted in order to further investigate the response of this material during high-pressure acid leaching. In situ synchrotron powder X-ray diffraction data were collected from a number of nontronite samples during hydration and leaching reactions at ambient and elevated temperatures. The present study followed previous high-pressure acid-leaching studies of nontronite where unexpected contraction and expansion behavior of the clay was observed by means of in situ X-ray diffraction. In the earlier studies the data sets only extended to ~20 Å so that when the nontronite expanded to greater than 19.5 Å (hydrated) the main 001 peak was only partially visible in the observed d-spacing range. The aim of the current work was to collect similar in situ diffraction data over a greater d-spacing range to observe more fully the movement of the main 001 reflection in order to better understand the changes taking place. This work was undertaken at the powder diffraction beamline of the Australian Synchrotron which was configured such that an upper d-spacing limit of ~34.5 Å could be achieved. Suggestions arising out of the previous work were confirmed along with additional information from testing of samples from the Source Clays Repository of The ClayMinerals Society. These results also show contradictory behavior of clays with the layer charge distributed over tetrahedral and octahedral sheets.

Keywords

High-pressure Acid LeachingNontronitePowder XRDTime-resolved XRDSynchrotron
Type
Article
Information
Clays and Clay Minerals , Volume 59 , Issue 6 , December 2011 , pp. 560 - 567
Copyright
Copyright © Clay Minerals Society 2011

References

Bayliss, P., 1989 Unit-cell determinations of two-dimensional clay minerals Powder Diffraction 4 19–20.CrossRefGoogle Scholar
Bruker, A.X.S., 1999 Topas v3: General profile and structure analysis software for powder diffraction data.Google Scholar
Dalvi, A.D. Bacon, W.G. and Osborne, R.C., 2004 The past and the future of nickel laterites PDAC 2004 International Convention, Trade Show & Investors Exchange.Google Scholar
Gates, W.P. Slade, P.G. Manceau, A. and Lanson, B., 2002 Site occupancies by iron in nontronites Clays and Clay Minerals 50 223–239.CrossRefGoogle Scholar
Keeling, J.L. Raven, M.D. and Gates, W.P., 2000 Geology and characterisation of two hydrothermal nontronites from weathered metamorphicroc ks at the Uley graphite mine, South Australia Clays and Clay Minerals 48 537–548.CrossRefGoogle Scholar
Komadel, P. Madejová, J., Bergaya, F. Theng, B.K.G. and Lagaly, G., 2006 Acid activation of clay minerals Handbook of Clay Science Amsterdam Elsevier Ltd. 263–287.CrossRefGoogle Scholar
Madejová, J. Bujdak, J. Janek, M. and Komadel, P., 1998 Comparative FT-IR study of structural modifications during acid treatment of dioctahedral smectites and hectorite Spectrochimica Acta Part A 54 1397–1406.CrossRefGoogle Scholar
Madsen, I.C. Scarlett, N.V.Y. and Whittington, B.I., 2005 Pressure acid leaching of nickel laterite ores: An in situ diffraction study of the mechanism and rate of reaction Journal of Applied Crystallography 38 927–933.CrossRefGoogle Scholar
Norby, P. Cahill, C. Koleda, C. and Parise, J. B., 1998 A reaction cell for in situ studies of hydrothermal titration Journal of Applied Crystallography 31 481–483.CrossRefGoogle Scholar
Scarlett, N.V.Y. Madsen, I.C. and Whittington, B.I., 2008 Time-resolved diffraction studies into the pressure acid leaching of nickel laterite ores: A comparison of laboratory and synchrotron X-ray experiments Journal of Applied Crystallography 41 572–583.CrossRefGoogle Scholar
Schmitt, B. Brönnimann, C. Eikenberry, E.F. Gozzo, F. Hörmann, C. Horisberger, R. and Patterson, B., 2003 Mythen detector system Nuclear Instruments and Methods in Physics Research Section A 501 267–272.CrossRefGoogle Scholar
Suquet, H. de la Calle, C. and Pezerat, H., 1975 Swelling and structural organisation of saponite Clays and Clay Minerals 23 1–9.CrossRefGoogle Scholar
Whittington, B.I. McDonald, R.G. Johnson, J.A. and Muir, D., 2003 Pressure acid leaching of arid-region nickel laterite ore: Part I: Effect of water quality Hydrometallurgy 70 31–46.CrossRefGoogle Scholar