Gold chalcogenides

{{Short description|Class of chemical compound}}

Gold chalcogenides are compounds formed between gold and one of the chalcogens, elements from group 16 of the periodic table: oxygen, sulfur, selenium, or tellurium.

• Gold(III) oxide, Au₂O₃. Decomposes into gold and oxygen above 160 °C, and dissolves in concentrated alkalis to form solutions which probably contain the [Au(OH)₄]⁻ ion
• Gold(I) sulfide, Au₂S. Formed by reaction of hydrogen sulfide with gold(I) compounds.
• Gold(III) sulfide, Au₂S₃, claimed material but unsubstantiated.
• Gold tellurides: Au₂Te₃, Au₃Te₅, and AuTe₂ (approximate formulas) are known as non-stoichiometric compounds. They show metallic conductivity. Au₃Te₅ is a superconductor at 1.62 K.{{cite journal|last1=Luo|first1=H.L.|last2=Merriam|first2=M.F.|last3=Hamilton|first3=D.C.|title=Superconducting Metastable Compounds|journal=Science|date=1964|volume=145|issue=3632|pages=581–583|doi=10.1126/science.145.3632.581|pmid=17735806|bibcode=1964Sci...145..581L|s2cid=41529555}}

Gold telluride minerals, such as calaverite and krennerite (AuTe₂), petzite (Ag₃AuTe₂), and sylvanite (AgAuTe₂), are minor ores of gold (and tellurium). See telluride minerals for more information.