Gold chalcogenides Wikipedia
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, Au 2 O 3.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, Au 2 S. Formed by