Polybasite is a mineral that has some unusual spelling features. The word consists of three syllables: "pol-y-ba-site." The first syllable starts with a "p," and the second syllable has a long "o" sound. The final syllable ends with a "t." The IPA phonetic transcription would be /ˈpɒliˌbeɪsaɪt/. The spelling of Polybasite reflects its chemical composition, which includes silver, lead, arsenic, sulfur, and antimony. Despite its tricky spelling, Polybasite is an essential mineral for the mining industry and has various uses in electrical and electronic equipment.
Polybasite is a mineral that belongs to the sulfosalt group and is characterized by its varying silver content and unique crystal structure. Its name is derived from the Greek words "polys," meaning many, and "basis," meaning base, which refers to the mineral's composition of multiple base metals. Polybasite typically forms as opaque, dark gray to black prismatic crystals or as granular masses.
Chemically, polybasite consists of a complex combination of silver, copper, antimony, and sulfur atoms. Its chemical formula is Ag(Cu,Ag)6(Sb,As)S4. The silver content in polybasite can vary, meaning it can contain different proportions of silver and copper. This variability results in a range of colors observed in polybasite crystals, with specimens from certain localities exhibiting a reddish hue.
Polybasite is primarily found in hydrothermal veins and low-temperature veins associated with mineral deposits rich in silver, copper, and antimony. It commonly occurs alongside other sulfide minerals such as pyrite, sphalerite, and galena. Some notable localities known for producing high-quality polybasite specimens include Mexico, Bolivia, and Germany.
Due to its high silver content, polybasite has been historically sought after as an ore mineral for its economic value. However, it is also appreciated by mineral collectors for its distinct crystal habit and unique combination of base metals.
A rich ore of silver of an iron-black colour.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
The word "Polybasite" has its origins in Greek, specifically from the combination of two Greek words: "polys" meaning "many" or "multiple", and "basis" meaning "base" or "base metal". This name was given to the mineral due to its composition, which is a complex sulfosalt of several base metals, including silver, lead, and antimony. The term "Polybasite" was first introduced in the field of mineralogy in the early 19th century, mainly to describe the particular mineral's multiple metallic components.