Gold chalcogenides are compounds formed between gold and one of the chalcogens, elements from group 16 of the

periodic table The periodic table, also known as the periodic table of the (chemical) elements, is a rows and columns arrangement of the chemical elements. It is widely used in chemistry, physics, and other sciences, and is generally seen as an icon of ch ...

: oxygen,

sulfur Sulfur (or sulphur in British English) is a chemical element with the symbol S and atomic number 16. It is abundant, multivalent and nonmetallic. Under normal conditions, sulfur atoms form cyclic octatomic molecules with a chemical formula ...

, selenium, or tellurium. *

Gold(III) oxide Gold(III) oxide (Au2O3) is an inorganic compound of gold and oxygen with the formula Au2O3. It is a red-brown solid that decomposes at 298 °C. According to X-ray crystallography, AuO features square planar gold centers with both 2- and 3- ...

, Au₂O₃. Decomposes into gold and oxygen above 160 °C, and dissolves in concentrated alkalis to form solutions which probably contain the u(OH)₄sup>− ion * Gold(I) sulfide, Au₂S. Formed by passing

hydrogen sulfide Hydrogen sulfide is a chemical compound with the formula . It is a colorless chalcogen-hydride gas, and is poisonous, corrosive, and flammable, with trace amounts in ambient atmosphere having a characteristic foul odor of rotten eggs. The unde ...

through solutions of gold(I) compounds. * Gold(III) sulfide, Au₂S₃, unstable in the presence of water. *Gold tellurides: Au₂Te₃, Au₃Te₅, and AuTe₂ (approximate formulæ) are known as non-stoichiometric compounds. They show metallic conductivity. One telluride of gold is a superconductor at very low temperatures: Au₃Te₅ (1.62 K). Natural gold tellurides, like calaverite and krennerite (AuTe₂), petzite ( Ag₃AuTe₂), and

sylvanite Sylvanite or silver gold telluride, chemical formula , is the most common telluride of gold. Properties 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 c ...

(AgAuTe₄), are minor ores of gold (and tellurium). See telluride minerals for more information on individual naturally occurring tellurides.

References

* Gold compounds Non-stoichiometric compounds Sulfides Tellurides {{inorganic-compound-stub Transition metal oxides