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WiluiteWiluite is a dark green, brownish, or black blocky silicate mineral with formula: Ca19(Al,Mg,Fe,Ti)13(B,Al,[ ])5Si18O68(O,OH)10. It has a Mohs hardness of 6 and a specific gravity of 3.36. It has a vitreous lustre, poor cleavage and an irregular brittle fracture. It crystallizes in the tetragonal system and occurs as well-formed crystals with good external form. It is isostructural with the vesuvianite group and is associated with wollastonite and olive-green grossulars (viluites) in a serpentinized skarn. Additional recommended knowledgeThe minerals that wiluite and viluite refer to have often been confused, and may refer to grossular,[1][2] or wiluite.[3][4][5] It was discovered in the 1990s and named for the Wilui River region, Saha Republic (Yakutia), Russia.
References
Categories: Minerals | Silicate minerals |
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Wiluite". A list of authors is available in Wikipedia. |