Saponite
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Saponite is a monoclinic mineral of the montmorillonite group. Its chemical formula is (½Ca,Na)0.33(Mg,Fe+2)3(Si,Al)4O10(OH)2·4H2O.
It is soft, massive, and plastic, and exists in veins and cavities in serpentinite and basalt. The name is derived from the Greek sapo, soap. Other names include bowlingite; mountain soap; piotine; soapstone.
[edit] References
This article contains material from the U.S. Bureau of Mines Dictionary of Mining, Mineral, and Related Terms.
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