Xonotlite is a
mineralwith the chemical formula Ca6Si6O17(OH)2. It crystallizes in the monoclinic- prismatic crystal systemwith typically an acicularcrystal form or habit. It can be colorless, gray, light gray, lemon white, or pink. It is transparent with a vitreousto silky luster. It leaves a white streak. Xonotlite is rated 6.5 on the Mohs Scaleof hardness. It was first described in 1866 and named for its occurrence in Tetela de Xonotla, Puebla, Mexico. It occurs as veins in serpentiniteand contact metamorphismaureoles.
* [http://webmineral.com/data/Xonotlite.shtml Webmineral data]
* [http://rruff.geo.arizona.edu/doclib/hom/xonotlite.pdf Mineral Data Publishing]
* [http://www.mindat.org/min-4343.html Mindat with location data]
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