Mineralogical and chemical properties of weathered magnetite grains from lateritic saprolite
- 1 December 1984
- journal article
- Published by Wiley in European Journal of Soil Science
- Vol. 35 (4) , 559-567
- https://doi.org/10.1111/j.1365-2389.1984.tb00613.x
Abstract
SUMMARY: Magnetite grains in lateritic saprolite have altered in situ to porous hematite (martite) grains. Hematite occurs as relatively large (∼ 1 μm) platy crystals, triangular arrays of small (0.01–0.05 μm) lathlike crystals and very small (< 100 Å) platy anhedral particles. Titanium increased in altered grains and may substitute for Fe3+ in hematite. Mn, V, Cr and Zn remained approximately constant whereas the Ni content decreased. Halloysite crystallized from soil solution within pores resulting in a marked increase in the Si and Al contents of grains.Keywords
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