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Sylvanite
Sylvanite

Sylvanite

Sylvanite

A species of Minerals, Also known as Aurotellurite, Graphic Tellurium, Tellure auro-argentifère, Tellursilberblei, Yellow Tellurium

Sylvanite or silver gold telluride, (Ag,Au)Te2, is the most common telluride of gold.

Hardness
Hardness:

1.5 - 2

Density
Density:

8.161 g/cm³

General Info About Sylvanite

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Physical Properties of Sylvanite

Colors
Grey, white, pale yellow silver-white
Streak
Silver-white
Hardness
1.5 - 2 , Extremely soft
Density
8.161 g/cm³, Obviously Heavy Weight
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Chemical Properties of Sylvanite

Formula
(Au,Ag)2Te4
Au:Ag ratio usually is close to 1:1
Elements listed
Ag, Au, Te
Common Impurities
Sb,Pb,Cu,Ni

Characteristics of Sylvanite

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Characteristics of Sylvanite

The gold:silver ratio varies from 3:1 to 1:1. It is a metallic mineral with a color that ranges from a steely gray to almost white. It is closely related to calaverite, which is more purely gold telluride with 3% silver. Sylvanite crystallizes in the monoclinic 2/m system. Crystals are rare and it is usually bladed or granular. It is very soft with a hardness of 1.5–2. It has a high relative density of 8–8.2. Sylvanite is photosensitive and can accumulate a dark tarnish if it is exposed to bright light for too long.

Formation of Sylvanite

Sylvanite is found in Transylvania, from which its name is partially derived. It is also found and mined in Australia in the East Kalgoorlie district. In Canada it is found in the Kirkland Lake Gold District, Ontario and the Rouyn District, Quebec. In the United States it occurs in California and in Colorado where it was mined as part of the Cripple Creek ore deposit. Sylvanite is associated with native gold, quartz, fluorite, rhodochrosite, pyrite, acanthite, nagyagite, calaverite, krennerite, and other rare telluride minerals. It is found most commonly in low temperature hydrothermal vein deposits.

Cultural Significance of Sylvanite

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Uses of Sylvanite

Sylvanite represents a minor ore of gold and tellurium. Sylvanium, an obsolete term for tellurium, derived its name from sylvanite.

Common Questions People Also Ask

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