Inhibition of sintering by Si during the conversion of Si-rich ferrihydrite to hematite

The distribution and chemical state of Si in a synthetic 2-line ferrihydrite with a Si/(Si+Fe) molar ratio of 0.11 was studied. Heat treatment under oxidizing conditions shows that Si-rich ferrihydrite is stable to 400°C. The transformation to hematite and the formation of a polymerized amorphous-si...

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Veröffentlicht in:	Clays and clay minerals 2000-02, Vol.48 (1), p.51-56
Hauptverfasser:	Glasauer, Susan M, Hug, Paul, Weidler, Peter G, Gerhring, Andreas U
Format:	Artikel
Sprache:	eng
Schlagworte:	chemical properties chemical reactions clay mineralogy Earth sciences Earth, ocean, space Exact sciences and technology experimental studies ferrihydrite geochemistry hematite Mineralogy Non silicates oxides polyhedra sed rocks, sediments Sedimentary petrology silicon sintering X-ray diffraction data
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