Afwillite

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Afwillite is a calcium hydroxide nesosilicate mineral with formula Ca₃Si₂O₄(OH)₆. It occurs as glassy, colorless to white prismatic monoclinic crystals. Its Mohs scale rating is 4.5. It occurs as an alteration mineral in contact metamorphism of limestone.

It was first described in 1925 for an occurrence in the Dutoitspan Mine, Kimberley, South Africa and was named for Alpheus Fuller Williams (1874-1953), a past official of the De Beers diamond company.

[edit] External links

• Mindat with location data
• Webmineral data
• American Mineralogist PDF

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Retrieved from "http://en.wikipedia.org../../../a/f/w/Afwillite.html"

Categories: Calcium minerals | Silicate minerals | Hydroxide minerals | Mineral stubs

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• This page was last modified 17:54, 13 October 2006 by Wikipedia user Daarznieks. Based on work by Wikipedia user(s) FlaBot, YurikBot, Jaraalbe, CDN99, Vsmith and Merovingian.
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