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Siderophyllite is a rare member of the mica group of silicate minerals with formula: KFe++Al(Al2Si2)O10(F,OH)2
Additional recommended knowledge
The mineral occurs in nepheline syenite pegmatites and granite and aplite greisens. It is associated with microcline and astrophyllite at Pikes Peak, Colorado. It is also found in the alkali pegmatites of Mont Saint-Hilaire, Quebec.
It was first described in 1880 for an occurrence near Pikes Peak, Colorado. The name derives from the Greek "sideros", iron, plus "phyllon", leaf, in reference to its iron rich composition and perfect basal cleavage.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Siderophyllite". A list of authors is available in Wikipedia.|