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tetrahedrite
[ te-truh-hee-drahyt ]
noun
- a steel-gray or blackish mineral with a brilliant metallic luster, essentially copper and antimony sulfide, (Cu, Fe, Zn, Ag,) 12 Sb 4 S 13 , an end member of a series of solid solutions into which arsenic enters to form tennantite: mined as an ore of copper and silver.
tetrahedrite
/ ËŒ³ÙÉ›³Ù°ùəˈ³ó¾±Ë»å°ù²¹Éª³Ù /
noun
- a grey metallic mineral consisting of a sulphide of copper, iron, and antimony, often in the form of tetrahedral crystals: it is a source of copper. Formula: (Cu,Fe) 12 Sb 4 S 13
˜yÐÄvlog History and Origins
Origin of tetrahedrite1
Example Sentences
Tetrahedrite, blende, diamond, boracite and pharmacosiderite are substances which crystallize in this class.
Tetrahedrite, the typical species, is composed of copper, sulphur, and antimony.
Fine crystals of large size have been found with quartz and chalybite in the mines at Neudorf in the Harz, and with blende and tetrahedrite at Kapnik-B�nya near Nagy-B�nya in Hungary.
In external form these crystals are cubic with inclined hemihedrism, the symmetry being the same as in blende and tetrahedrite.
Ores.—The principal ores of copper are the oxides cuprite and melaconite, the carbonates malachite and chessylite, the basic chloride atacamite, the silicate chrysocolla, the sulphides chalcocite, chalcopyrite, erubescite and tetrahedrite.
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