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Schwertmannite - Wikipedia, the free encyclopedia
Schwertmannite is an iron-oxyhydroxysulfate mineral with an ideal chemical formula of Fe 8 O 8 (OH) 6 (SO 4 ) ·nH 2 O or Fe 3+ 16 O 16 (OH,SO 4 ) 12-13 ·10-12H 2 O. It is an...
en.wikipedia.org/wiki/Schwertmannite |
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Click Here for Larger Schwertmannite Image in a New Browser Window Images: .... Print or Cut-and-Paste your Schwertmannite Specimen Label here : ...
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Schwertmannite Fe3+; 16 O16(SO4)2(OH)12 •nH2O (n 10 to 12) c 2001-2005 Mineral Data Publishing, version 1; Crystal Data: Tetragonal. Point Group: 4/m (probable). As fibrous aggregates of poorly-crystalline needles, to 100 μm, in films and thin to thick crusts.
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Schwertmannite mineral data, information about Schwertmannite, its properties and worldwide locations. ... T. P. Pedersen, SCHWERTMANNITE AND AWARUITE AS ALTERATION PRODUCTS IN IRON METEORITES. 62nd Annual Meteoritical Society Meeting...
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A proposed formula for schwertmannite is Fe4O4(OH)2 · AN(2/e) * nH2O, where AN is the anion and e is its charge, where sulfate can be replaced with other anions, a possible catalyst. The facile conversion of schwertmannite to a black or yellow material might make a useful raw material for the pigment industry.
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May 5, 2009 ... Chemical conditions beneath glaciers are difficult to observe and are usually studied by sampling meltwaters emerging from glacial oulets or ...
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END analyses suggest that most schwertmannite whiskers have a structure consistent with the maghemite-like structural component previously described by Janney et al. (2000a) for ferrihydrite. Some sections of whiskers also contain the previously described highly disordered ferrihydrite structural component (Janney et al.
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The Fe-sulphates, jarosite (KFe3(OH)6(SO4)2) and probably schwertmannite (Fe8O8(OH) 6S04) are found in the precipitates and have formed from high SO42- and acid solutions.
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MARS SURFACE I Tuesday, 10:30 - 12:00 Salon II/III J. L. Bishop and J. F. Bell, Moderators 12.01 Bishop J. L.* Reflectance Spectroscopy of Schwertmannite and Implications for the Surface Material on Mars 12.02 Arnold G. E.* Bishop J. L. Beinroth A. Ellipsometry, Reflectance and Emittance Spectroscopy of Quartz Particle...
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Trace metal retention through the schwertmannite to goethite transformation as observed in a field setting, Alta Mine, MT by Andrew W. Schroth; ... Schwertmannite was always in contact with actively flowing ASW, while goethite was never in direct contact with ASW and was generally above the waste-rock water table.
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