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The natural occurrence of x-alumina in lateritic pisolites

Published online by Cambridge University Press:  09 July 2018

Balbir Singh  and
R. J. Gilkes
Balbir Singh
Affiliation:
Centre for Microscopy and Microanalysis, The University of Queensland, BrisbaneQld. 4072
R. J. Gilkes
Affiliation:
Centre for Microscopy and Microanalysis, The University of Queensland, BrisbaneQld. 4072 Soil Science and Plant Nutrition, University of Western Australia, NedlandsWA 6009, Australia
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Abstract

Pisolites in the bauxitic laterites of Darling Range, Western Australia may contain up to 50% AI2O3, although no major Al-containing phases can be identified using standard X-ray diffraction techniques. These pisolites have been investigated using a range of techniques, and it has been demonstrated that Al is present in the form of x-alumina, a poorly crystalline form of A12O3. The x-alumina exhibits an indurating morphology and appears to have formed from a hydrated precursor.

Type
Research Article
Information
Clay Minerals , Volume 30 , Issue 1 , March 1995 , pp. 39 - 44
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1995

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References

Anand, R.R. & Gilkes, R.J. (1987a) Variations in the properties of iron oxides within individual specimens of lateritie duricrust. Aust. J. Soil Res. 25, 287–302.Google Scholar
Anand, R.R. & Gilkes, R.J. (1987b) The association of maghemite and corundum in Darling Range laterites, Western Australia. Aust. J. Soil Res., 25, 303–311.Google Scholar
Brimhall, G.H., Lewis, C.J., Ague, J.J., Dietrich, W.E Hampel, J., Teague, T. & RIx, P. (1988) Metal enrichment in bauxites by deposition of chemically mature aeolian dust. Nature 333, 819—824.Google Scholar
Grubb, P.L.C (1971) Mineralogical anomalies in the Darling Range Bauxite at Jarrahdale, Western Australia. Econ. Geol.. 66, 1005–1016.CrossRefGoogle Scholar
Hsv, P.A. (1989) Aluminium hydroxides and oxyhydr-oxides. Pp. 331—378 in: Minerals in Soil Environments (Dixon, J.B. & Weed, S.B., editors) Soil Sci. Soc. America, Madison, Wisconsin, USA.Google Scholar
Misra, C. (1986) Industrial Alumina Chemicals. ACS monograph, 184.Google Scholar
Rooksby, H.P. (1961) Oxides and hydroxides of aluminium and iron. Pp. 354—392 in: X-ray Identification and Crystal Structures of Clay Minerals (Brown, G., editor) Mineralogical Society, London.Google Scholar
Sadleir, S.B. & Gilkes, R.J. (1976) Development of bauxite in relation to parent material near Jarrahdale, Western Australia. J. Geol. Soc. Aust. 23, 333–344.Google Scholar
Singh, B. & Gilkes, R.J. (1993) Recognition of amorphous silica in indurated soil profiles. Clay Miner. 28, 461–474.CrossRefGoogle Scholar
Wefers, K. & Misra, C. (1987) Oxides and Hydroxides of Aluminium. Alcoa Technical Centre USA.Google Scholar