|Molar mass||425.998 g/mol|
|Solubility in water||Insoluble|
|Other anions||Copper(I) sulfide|
| (what is: / ?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Gold(I) sulfide is the inorganic compound with the formula Au2S. It is one of two principal sulfides of gold, the other being gold(III) sulfide, Au2S3. Gold sulfides exist in nature as solid solutions with silver, which has the same covalent radius.
 Structure and preparation
The compound crystallizes in the motif seen for cuprous oxide: gold is 2-coordinate, sulfur 4-coordinate, and the S-Au-S linkage is linear. Linear coordination geometry is typically adopted by gold(I) compounds, such as the coordination complex chloro(dimethyl sulfide)gold(I).
This product is described as "initially dark reddish-brown" solid that turns "steel-gray".
- Wells, A.F. (1984) Structural Inorganic Chemistry, Oxford: Clarendon Press. ISBN 0-19-855370-6.
- N. N. Greenwood, A. Earnshaw, Chemistry of the Elements, 2nd ed., Butterworth-Heinemann, Oxford, UK, 1997.
- Faltens, Marjorie O. (1970). "Mössbauer Spectroscopy of Gold Compounds". The Journal of Chemical Physics 53 (11): 4249. doi:10.1063/1.1673931.