The transformation of 2-line ferrihydrite to goethite from supersaturated solutions at alkaline
pH≥ 13.0 was studied using a combination of benchtop and advanced synchrotron …

Under oxic aqueous conditions, two-line ferrihydrite gradually transforms to more
thermodynamically stable and more crystalline phases, such as goethite and hematite. This …

2-line ferrihydrite stored in water at ambient temperatures from 4 to 25° C and at ten different
pH values between 2.5 and 12 for up to 10–12 y transformed to both goethite and hematite …

The rate and pathway of ferrihydrite (Fh) transformation at oxic conditions to more stable
products is controlled largely by temperature, pH, and the presence of other ions in the …

Aqueous ferrous iron (Fe (II)) accelerates the transformation of ferrihydrite into secondary,
more crystalline minerals however the factors controlling the rate and, indeed, the …

Iron (oxyhydr) oxides are sensitive indicators of pH, Eh, temperature, microbial activity, and
climate conditions in the Critical Zone. The most ubiquitous and environmentally significant …

In this study, we quantified the rate of ferrihydrite conversion to goethite via the Fe (II)
pathway using synchrotron radiation-based energy dispersive X-ray diffraction (ED-XRD) …

Two-line ferrihydrite (Fh), ubiquitous in soils, groundwater, and aquatic sediments, may
serve as an important sink for sequestering trace metals, metalloids, and organic matter via …

The presence of phosphate retards the transformation of ferrihydrite into crystalline products.
Increasing phosphate from 0 to 1 mole% results in an order of magnitude decrease in the …

Recent work has shown that iron oxides, such as goethite and hematite, may recrystallize in
the presence of aqueous Fe2+ under anoxic conditions. This process, referred to as Fe2+ …