Ferrihydrite
Ferrihydrite | ||
---|---|---|
Formula mass 168.70 g/mol | | |
Color | Dark brown, yellow-brown | |
Crystal habit | Aggregates, microscopic crystals | |
Streak | Yellow-brown | |
Diaphaneity | Opaque | |
Density | 3.8 g/cm3 | |
References | [2][3][4][5] |
Ferrihydrite (Fh) is a widespread hydrous ferric oxyhydroxide
Structure
Ferrihydrite only exists as a fine grained and highly defective
Due to the nanoparticulate nature of ferrihydrite, the structure has remained elusive for many years and is still a matter of controversy.
Porosity and environmental absorbent potential
Because of the small size of individual
Metastability
Ferrihydrite is a
Under reducing conditions as those found in
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Ferrihydrite precipitate fromcoal minewater
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Spring in theZillertaler Alpswith Fh precipitate
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Seepage of iron-rich water
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Transformation of ferrihydrite (top) to goethite (bottom)
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Water treatment plant using the slow sand filter technology to treat raw water
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Tricolor (RGB) X-ray fluorescence image of the distribution of As (red), Fe (green), and Mn (blue) in coated quartz grains from a water treatment sand bed[39]
See also
Better crystallized and less hydrated iron oxy-hydroxides are amongst others:
- Akaganéite
- Feroxyhyte
- Goethite
- Hematite
- Lepidocrocite
- Limonite
- Maghemite
- Magnetite
References
- S2CID 235729616.
- ^ "Ferrihydrite Mineral Data". webmineral.com. Retrieved 2011-10-24.
- ^ "Ferrihydrite mineral information and data". mindat.org. Retrieved 2011-10-24.
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