halotrichite

halotrichite
/ha lo"treuh kuyt'/, n.
a mineral, iron alum, isomorphous with pickeringite, occurring in the form of yellowish fibers.
[1839; HALO- + TRICHITE]

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      a sulfate mineral containing aluminum and iron [FeAl2(SO4)4·22H2O]. If more than 50 percent of the iron has been replaced by magnesium, the mineral is called pickeringite. These minerals are usually weathering products of sedimentary rocks that contain aluminum and metallic sulfides and usually occur as efflorescences. They also occur in volcanic fumarole deposits, in the gossan (weathered capping) of sulfide ore veins, and, recently deposited, in lignite and coal seams. They are sometimes grouped in older literature with other salts having a hairlike habit as Haarsalz (“hair salts”). For detailed physical properties, see sulfate mineral (table).

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  • Halotrichite — Halotrichite, also known as feather alum , is a highly hydrated sulfate of aluminium and iron. It is formed by the weathering and decomposition of pyrite commonly near or in volcanic vents. Its chemical formula is FeAl2(SO4)4 sdot;22H2O. It forms …   Wikipedia

  • Halotrichite — Hal*o*tri chite (h[a^]l*[ o]*tr[imac] k[imac]t), n. [Gr. a ls sea + qri x, tricho s, hair.] (Min.) An iron alum occurring in silky fibrous aggregates of a yellowish white color. [1913 Webster] …   The Collaborative International Dictionary of English

  • halotrichite — Feather Feath er (f[e^][th] [ e]r), n. [OE. fether, AS. fe[eth]er; akin to D. veder, OHG. fedara, G. feder, Icel. fj[ o][eth]r, Sw. fj[ a]der, Dan. fj[ae]der, Gr. ptero n wing, feather, pe tesqai to fly, Skr. pattra wing, feather, pat to fly, and …   The Collaborative International Dictionary of English

  • halotrichite — halotrichitas statusas T sritis chemija apibrėžtis Mineralas. formulė FeAl₂[SO₄]₄·22H₂O atitikmenys: angl. halotrichite rus. галотрихит …   Chemijos terminų aiškinamasis žodynas

  • halotrichite — haˈlä.trəˌkīt noun ( s) Etymology: German halotrichit, from hal + trich + it ite 1. : a mineral FeAl2(SO4)4.22H2O consisting of a hydrous iron aluminum sulfate 2. : any of several sulfates similar to halotrichite in construction and habit …   Useful english dictionary

  • halotrichite — ha·lot·ri·chite …   English syllables

  • Halotrichit — Haarförmiger Halotrichit aus der Golden Queen Mine, Soledad Mountain, Golden Queen, Kern County, Kalifornien, USA (Größe: 5.2 x 4.2 x 3.3 cm) Chemische Formel Fe2+Al2[SO4]4 • 22 H2O …   Deutsch Wikipedia

  • Eisenalaun — Halotrichit Chemische Formel Fe2+Al2[SO4]4 • 22 H2O Mineralklasse Sulfate (Selenate, etc.) ohne weitere Anionen, mit H2O Mit ausschließlich mittelgroßen Kationen 7.CB.85 (9. Aufl.) ; VI/C.12 …   Deutsch Wikipedia

  • Federalaun — Halotrichit Chemische Formel Fe2+Al2[SO4]4 • 22 H2O Mineralklasse Sulfate (Selenate, etc.) ohne weitere Anionen, mit H2O Mit ausschließlich mittelgroßen Kationen 7.CB.85 (9. Aufl.) ; VI/C.12 …   Deutsch Wikipedia

  • Haarsalz — Halotrichit Chemische Formel Fe2+Al2[SO4]4 • 22 H2O Mineralklasse Sulfate (Selenate, etc.) ohne weitere Anionen, mit H2O Mit ausschließlich mittelgroßen Kationen 7.CB.85 (9. Aufl.) ; VI/C.12 …   Deutsch Wikipedia

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