[pol-ee-bey-sahyt, puh-lib-uh-sahyt]
a blackish mineral, Ag 9 SbS 6 : a minor ore of silver.

1820–30; < German Polybasit. See poly-, base1, -ite1

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World English Dictionary
polybasite (ˌpɒlɪˈbeɪsaɪt, pəˈlɪbəˌsaɪt)
a grey to black mineral consisting of a sulphide of silver, antimony, and copper in the form of platelike monoclinic crystals. It occurs in veins of silver ore. Formula: (Ag,Cu)16Sb2S11
[C19: from poly- + base1 + -ite1]

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Encyclopedia Britannica


heavy, black sulfosalt mineral, a sulfide of the elements silver, copper, and antimony ([Ag, Cu]16Sb2S11), that occurs as monoclinic crystals and masses in silver veins, sometimes in large amounts.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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