Atomistry » Gold » Chemical Properties » Auric sulphide
Atomistry »
  Gold »
    Chemical Properties »
      Auric sulphide »

Auric sulphide, Au2S3

Gold does not combine directly with sulphur, but at -2° C. a rapid current of hydrogen sulphide transforms aurichloric acid, HAuCl4, in dilute solution in normal hydrochloric acid, into pure auric sulphide. Lithium aurichloride, LiAuCl4,2H2O, at -10° C. is converted by hydrogen sulphide into a mixture of lithium chloride and impure auric sulphide, with evolution of hydrogen chloride. After extraction of the lithium chloride with alcohol, the sulphide is dried in a current of nitrogen at 70° C. It is an amorphous, black powder, at once decomposed by the action of water. At 200° to 205° C. it is converted into a mixture of gold and sulphur. It forms double sulphides with the alkali-metals; and also unites with the sulphides of elements of weak positive, or even of negative,- character, such as arsenic, tellurium, molybdenum, and carbon. The last class of compound is probably to be regarded as an auric salt of a complex acid containing sulphur and one of the elements mentioned.

Last articles

Zn in 8WB0
Zn in 8WAX
Zn in 8WAU
Zn in 8WAZ
Zn in 8WAY
Zn in 8WAV
Zn in 8WAW
Zn in 8WAT
Zn in 8W7M
Zn in 8WD3
© Copyright 2008-2020 by atomistry.com
Home   |    Site Map   |    Copyright   |    Contact us   |    Privacy