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tetrahedrite

[te-truh-hee-drahyt] /ˌtɛ trəˈhi draɪt/
noun
1.
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.
Origin of tetrahedrite
1865-1870
1865-70; tetrahedr(on) + -ite1, modeled on German Tetraedrit
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Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for tetrahedrite

tetrahedrite

/ˌtɛtrəˈhiːdraɪt/
noun
1.
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)12Sb4S13
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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