Pearceite-Polybasite series. One of the four "ruby silvers" (pyrargyrite, proustite and miargyrite are the other three).Two structural varieties (trigonal, P321, corresponding to the polytype T2ac, and monoclinic, C2/c, corresponding to the polytype M2a2b2c) are reported by Evain et al. (2006).The third polytype is Tac, space group P-3m1. In a nomenclature change in 2006, the old name ...
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Polybasite is a sulfosalt mineral of silver, copper, antimony and arsenic. Its chemical formula is [(Ag,Cu) 6 (Sb,As) 2 S 7][Ag 9 CuS 4]. It forms black monoclinic crystals (thin, tabular, with six corners) which can show dark red internal reflections. It has a Mohs hardness of 2.5 to 3.
Polybasite, 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. Polybasite is found in Chile, Peru, the Czech Republic, and many localities in Mexico
The polybasite spec imens are similarly iridescent, but are rosettes of very thin, symmetrically offset hexagonal plates; most of these too are thumbnails, but there are two 5-cm miniatures in which the polybasite rosettes reach 3 cm across.
A polytype of Polybasite Previously known as "antimonpearceite", which was originally described from Sonora, Mexico. Was renamed during a nomenclature change in 2006 (Bindi et al., 2007).
Polybasite is a somewhat uncommon silver bearing mineral. Although not a well known ore of silver, it is never-the-less a locally important ore in some mines. It forms interesting crystals that have a pseudohexagonal outline with rhombohedral striations.
Define polybasite. polybasite synonyms, polybasite pronunciation, polybasite translation, English dictionary definition of polybasite. n. A black mineral with a metallic luster, essentially 16Sb2S11, that is an ore of silver. n a grey to black mineral consisting of a sulphide of silver,...
Polybasite is an uncommon mineral containing silver and copper in its structure. It is almost always found in known silver deposits, often in association with Stephanite.Polybasite forms a series with Pearceite, with Polybasite being the antimony-rich member, and Pearceite being the arsenic-rich member.It is often not possible to visually distinguish these two minerals from each other.
Polybasite definition is - an iron-black metallic-looking ore (Ag,Cu)16Sb2S11 of silver consisting essentially of silver, copper, sulfur, and antimony.