Tetrahedrite

Tet`ra·he'drite noun [ So called because the crystals of the species are commonly tetrahedrons .] (Min.) A sulphide of antimony and copper, with small quantities of other metals. It is a very common ore of copper, and some varieties yield a considerable presentage of silver. Called also ...
Found on http://www.encyclo.co.uk/webster/T/34

tetrahedrite

<chemical> A sulphide of antimony and copper, with small quantities of other metals. It is a very common ore of copper, and some varieties yield a considerable presentage of silver. ... Synonym: gray copper ore, fahlore, and panabase. ... Origin: So called because the crystals of the species are commonly tetrahedrons. ... Source: Websters Dic...
Found on http://www.encyclo.co.uk/local/20973

Tetrahedrite

• (n.) A sulphide of antimony and copper, with small quantities of other metals. It is a very common ore of copper, and some varieties yield a considerable presentage of silver. Called also gray copper ore, fahlore, and panabase.
Found on http://thinkexist.com/dictionary/meaning/tetrahedrite/

tetrahedrite

common sulfosalt mineral, an antimony sulfide of copper, iron, zinc, and silver [(Cu,Fe,Zn,Ag)12Sb4S13], that is an important ore of copper and ...
Found on http://www.britannica.com/eb/a-z/t/30

Tetrahedrite

Tetrahedrite (grey copper ore, fahlore, or panabase), so called because the crystals of the species are commonly tetrahedrons, is sulphide of antimony and copper, with small quantities of other metals. It is an ore of copper and silver. It is commonly found in hydrothermal veins formed at low to moderate temperatures and is usually associated with ...
Found on http://www.probertencyclopaedia.com/browse/HT.HTM

Tetrahedrite

Tetrahedrite is a copper antimony sulfosalt mineral with formula: {Chem|(Cu,Fe)|12|Sb|4|S|13}. It is the antimony endmember of the continuous solid solution series with arsenic-bearing tennantite. Pure endmembers of the series are seldom if ever seen in nature. Of the two, the antimony rich phase is more common. Other elements also substitute in t...
Found on http://en.wikipedia.org/wiki/Tetrahedrite
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