A new model for transformation of ferrihydrite to hematite in soils and sediments
Ferrihydrite is among the most common precursors for iron-oxide formation in soils and sediments. Previous studies proposed a three-stage process for ferrihydrite transformation to hematite via an intermediate ferrimagnetic phase, which provides the basis for interpreting iron-oxide formation and its paleoenvironmental significance. From our new results, we identified two extra stages in this transformation, which fundamentally change the conventional model. The revised five-stage model is: (I)...[Show more]
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