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SYLVANITE

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Originally appearing in Volume V26, Page 284 of the 1911 Encyclopedia Britannica.
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SYLVANITE , a See also:

mineral consisting of See also:gold and See also:silver telluride, AuAgTe4, containing gold 24.2 and silver 13.3 %; an important ore of gold. Crystals are See also:monoclinic and often very See also:rich in faces; they are frequently twinned, giving rise to branching forms resembling written characters; on this See also:account the mineral was See also:early known as " graphic gold " or " graphic See also:tellurium " (Ger. Schrifterz). It was also known as " See also:white gold," the See also:colour being See also:tin-white with a brilliant metallic lustre. The hardness is 2 and the specific gravity 8.2. It occurs with native gold in See also:veins traversing See also:porphyry at Offenbanya and Nagyag, near See also:Deva in Transylvania (from which See also:country it takes its name) ; also at several places in See also:Boulder See also:county, See also:Colorado, and at Kalgoorlie in Western See also:Australia. Sylvanite may be readily distinguished from calaverite (AuTez) by its perfect cleavage in one direction (parallel to the See also:plane of symmetry), but in this See also:character it resembles the very rare orthorhombic mineral krennerite ([Au, Ag]Tez). (L. J.

End of Article: SYLVANITE

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