Crystal structure refinement of akaganéite

Crystal structure refinement of akaganéite

Powder XRD data and the Rietveld method have been used to refine the crystal structure of akaganeite, Fe7.6Ni0.4O6.35(OH)9.65Cl1.25, that formed as a corrosion crust on the Camp del Cielo meteorite. The study confirms the hollandite- like structure. The symmetry, however, is not tetragonal as previo...

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Veröffentlicht in:The American mineralogist 1991-02, Vol.76 (1-2), p.272-277
Hauptverfasser: Post, Jeffrey E, Buchwald, Vagn F
Format: Artikel
Sprache:eng
Schlagworte:
akaganeite
Asia
ataxite
Campo del Cielo Meteorite
crystal structure
Far East
iron meteorites
Japan
meteorites
mineral data
Mineralogy
minerals
natural materials
nonsilicates
octahedrite
oxides
refinement
Rietveld method
X-ray diffraction data
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Beschreibung
Zusammenfassung:Powder XRD data and the Rietveld method have been used to refine the crystal structure of akaganeite, Fe7.6Ni0.4O6.35(OH)9.65Cl1.25, that formed as a corrosion crust on the Camp del Cielo meteorite. The study confirms the hollandite- like structure. The symmetry, however, is not tetragonal as previously reported, but is monoclinic (I2/m) with a 10.600(2), b 3.0339(5), c 10.513(2) Angstrom, beta 90.24(2) degrees .
ISSN:0003-004X
1945-3027