Variations in the properties of iron oxides within individual specimens of lateritic duricrust [Darling Range, Western Australia]

Anand, R.R.; Gilkes, R.J.

Variations in the properties of iron oxides within individual specimens of lateritic duricrust [Darling Range, Western Australia]

1987

Anand, R.R. | Gilkes, R.J. (Western Australia Univ., Nedlands. School of Agriculture)

The morphology and mineralogy of 22 duricrust samples were examined. Goethite and hematite in pisoliths and concretions were mostly highly Al substituted. Hematite crystals ranged from 140 to 520 A, and were systematically smaller in pisoliths. Crystal size of goethite and hematite decreased with increasing Al susbtitution. Differences in the properties of goethite and hematite between morphologically distinct materials in single hand specimens are indicative of the complex history of these duricrusts.

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