Zircophyllite

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Zircophyllite is a complex mineral, formula (K,Na)₃(Mn,Fe)₇(Zr,Ti,Nb)₂Si₈O₂₄(OH,F)₇. It crystallizes in the triclinic - pinacoidal crystal class as dark brown to black micaceous plates. It has perfect 001 cleavage, a Mohs hardness of 4 to 4.5 and a specific gravity of 3.34. Its indices of refraction are nα=1.708 nβ=1.738 nγ=1.747 and it has a 2V optical angle of 62°.

It occurs with natrolite in alkali pegmatites. It was discovered in 1972 in the Korgeredabinsh massif, Tuva, Russia and is named for its zirconium content and its relationship to astrophyllite. It is also known from the Mt Saint-Hilaire intrusive complex of Québec, Canada.

[edit] References

• Webmineral data
• Mindat with location data
• Mineral Data Publishing, PDF

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Categories: Mineral stubs | Silicate minerals | Potassium minerals | Sodium minerals | Manganese minerals | Iron minerals | Zirconium minerals | Titanium minerals

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• This page was last modified 04:06, 10 December 2006 by Wikipedia user Vsmith. Based on work by Wikipedia user(s) Deathfoe, FlaBot, Jaraalbe and Ping.
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