akaganeite

akaganeite

[‚a·kə′gan·ē‚īt]
(mineralogy)
β-FeO(OH) A mineral found in meteorites and considered to be formed in flight or by alteration.
References in periodicals archive ?
In the literature, the band in the 720 [cm.sup.-1] range is assigned to Fe-O vibrations of the akaganeite [29].
where [alpha], s, [gamma], and [beta] are the mass concentrations of goethite, spinel oxide, lepidocrocite, and akaganeite, respectively, and [[gamma].sup.*] is the total of s, [gamma], and [beta].
The Identified Phases Nature of the Corrosion and Scale Products Magnetite ([Fe.sub.3] Iron Oxide Corrosion Product: [O.sub.4]) Lepidocrocite (FeOOH) (i) At a high temperature Goethite (FeOOH) magnetite corrosion products Akaganeite (FeOOH) it will coat the iron/steel to prevent oxygen to reach underlying metal.
Additionally, the XRD patterns are well known for wide number of iron oxides and oxyhydroxides (including crystalline modifications, i.e., goethite, lepidocrocite, and akaganeite) and quantitive phase analysis of corrosion products is quite simple.
Removal of arsenic by sorption has been studied on hydrated cement, marble powder and brick powder [5], akaganeite decorated graphene oxide composite [6], bagasse fly ash-iron coated and sponge iron char [7], leonardite char [8], raw and acidified laterite [9], blue pine (Pinus wallichiana) and walnut (Juglans regia) [10], immobilized rice husk [11], iron coated rice husk [12], sorghum biomass [13], iron oxide-coated cement [14], iron hydroxide coated alumina [15] and red mud [16].
A transition from [Fe.sup.0], with peaks centred at 44.6, 65.6, and 82.6[degrees] 2[theta] (lattice reflections: Fe(110), Fe(200), and Fe(211), resp.), to a mixture of akaganeite ([beta]-FeOOH), ferrihydrite (5[Fe.sub.2][O.sub.3] x 9[H.sub.2]O), and magnetite ([Fe.sub.3][O.sub.4]) was recorded for both oxic and anoxic batch systems.
Recently, a new method in preparation of magnetite nanoparticle from iron oxyhydroxides (goethite, akaganeite, lepidocrocite, feroxyhyte, and ferrihydrite) and ferrous salt in aqueous solution was reported [7].
A second minor peak centred at 11.8[degrees] 2[theta] was also recorded for both nanomaterials, which is ascribed to akaganeite ([beta]-FeOOH), with a lattice reflection of (110) [22].
Even though the synthesized HMNPs adsorb less than some natural adsorbents as akaganeite, the obtained results make it possible to conclude that this nanotechnology is an original and potential solution for arsenic removal from superficial and groundwater samples.
X-ray diffraction results identified the akaganeite and magnetite phases in the corrosion product of samples submitted for 1000 h of reference accelerated testing.
Iron oxide dissolved in the mine's water then precipitates on the filaments to form a type of crystal called akaganeite. Described in the March 12 Science, each crystal measures only a couple of nanometers wide and up to 10 micrometers long.
Corrosion of Fe-Ni alloys by Cl-containing akaganeite ([gamma]-Fe00H): The Antarctic meteorite case.
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