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 Sb4S13, an end member of a series of solid solutions into which arsenic enters to form tennantite: mined as an ore of copper and silver.

Origin of tetrahedrite

1865–70; tetrahedr(on) + -ite¹, modeled on German Tetraedrit

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for tetrahedrite

Historical Examples of tetrahedrite

Tetrahedrite, blende, diamond, boracite and pharmacosiderite are substances which crystallize in this class.
Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7
Various
In external form these crystals are cubic with inclined hemihedrism, the symmetry being the same as in blende and tetrahedrite.
Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 2
Various

British Dictionary definitions for tetrahedrite

tetrahedrite

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

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012