polybasite


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pol·y·ba·site

 (pŏl′ē-bā′sīt′)
n.
A black mineral with a metallic luster, essentially (Ag,Cu)16Sb2S11, that is an ore of silver.

polybasite

(ˌpɒlɪˈbeɪsaɪt; pəˈlɪbəˌsaɪt)
n
(Minerals) 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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References in periodicals archive ?
Pyrargyrite stockwork in siderite and quartz-encrusted cavities, together with acanthite, native silver, barite, kaolinite, and museum-quality specimens of polybasite and stephanite were noted (Jeff Franzen and Ken Watson, pers.
The zones in 3 B are approximately the same in width and grade as the levels above (D 6) showing good continuity of the massive sulfides zones of polybasite discovered previously.
Visually the face of the crosscut and the wall of the slash are over 25% in sulphides, predominately consisting of high-grade polybasite.
24, 1998--On August the 21st the company reported, "There are now two distinct bands near the left wall and near the center that have over 80% sulphides (90% polybasite with 10% chalcopyrite as inclusions) each of these is at least 10cm in width.