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sylvanite

针碲金银矿

WordNet (r) 3.0 (2006) (WordNet)

sylvanite
n 1: a silver-white mineral consisting of silver gold telluride;
a source of gold in Australia and America [synonym:
{sylvanite}, {graphic tellurium}]

The Collaborative International Dictionary of English v.0.48 (gcide)

Sylvanite \Syl"van*ite\, n. [Fr. Transylvania, where first
found.] (Min.)
A telluride of gold and silver, {(Au, Ag)Te2}, of a steel
gray, silver white, or brass yellow. It often occurs in
implanted crystals resembling written characters, and hence
is called {graphic tellurium}. H., 1.5-2. Sp.gr., 7.9-8.3.
[Webster 1913 Suppl.]

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Sylvanite - Wikipedia
Sylvanite or silver gold telluride, chemical formula (Ag, Au) Te 2, is the most common telluride of gold 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: Mineral information, data and localities. - mindat. org
Grey, white, pale yellow silver-white Named in 1835 by Louis Albert Necker-de Saussure for the Transylvania region of Romania, where it was first found, and Sylvanium, one of the names proposed for the newly discovered element tellurium, which it contains ⓘ Baia de Arieș, Alba County, Romania Compare krennerite
Sylvanite Mineral Information and Facts - Nevada Outback Gems
Sylvanite is silver-white or steel-gray and has a brilliant metallic luster and a yellowish gray streak Sylvanite is more common than calaverite It is an isomorphous mixture of gold and silver tellurides in the ratio of about 1 to 1
The Mineral sylvanite - The Mineral and Gemstone Kingdom
Sylvanite is a unique mineral that forms with both gold and silver in its structure Sylvanite is structurally similar to Calaverite, but it contains silver in its structure in addition to gold If less than 13 4% of silver is replaced by gold, it is no longer classified as Sylvanite, but rather Calaverite
Sylvanite | Gold-Silver Alloy, Native Gold Silver | Britannica
sylvanite, a gold and silver telluride mineral [(Au,Ag)Te 2] in which the ratio of gold to silver atoms is commonly close to 1:1 It is a member of the krennerite group of sulfides and is found associated with them in ore veins formed at low temperatures in Hungary, Australia , Canada , and the western United States
Sylvanite Mineral Data
Sylvanite Comments: Flat-lying, metallic crystallized sylvanite on a quartz rich matrix Caleb Simkoff Collection Location: Sacaramb (Nagyag), Transylvania, Romania Scale: 7 5 x 8 5 x 4 cm © Dan Weinrich
Sylvanite mineral information and data - Dakota Matrix
It is present in small amounts in hundreds of gold-silver deposits, but not typically as rich specimens or as an economically viable mineral Sylvanite is a light sensitive mineral and can tarnish darkly if exposed to light for long periods
CALAVERITE SYLVANITE
Calaverite and sylvanite are rare precious metal telluride minerals Calaverite is gold telluride (AuTe2) and sylvanite is gold silver telluride ( (Au,Ag)2Te4) The telluride minerals volatilize at relatively low temperatures With heating, the tellurium component of these minerals readily vaporizes, leaving behind blebs of gold or gold silver
SYLVANITE (Silver Gold Telluride) - Amethyst Galleries
Sylvanite is one of the few minerals that is an ore of gold, besides native gold itself It is one of the most common gold bearing minerals The element gold is typically either found as native gold (in its elemental state), as an alloy with other metals such as silver and copper and as trace amounts in a few minerals
CSMS GEOLOGY POST: SYLVANITE: Au! ITS GOLD
Sylvanite [(AuAg) 2 Te 4] is a mineral composed of silver, gold, and tellurium and that makes it even more interesting The element tellurium is a silver-white metalloid (possesses properties of both metals and non-metals) with the symbol Te and the atomic number of 52 (number of protons in the nucleus of the atom)

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