Potassium gold cyanide

Potassium gold cyanide
Names
	IUPAC name Potassium dicyanoaurate(I)
	Other names potassium cyanoaurate; potassium dicyanoaurate; potassium gold dicyanide
Identifiers
CAS Number	13967-50-5;
3D model (JSmol)	ionic form: Interactive image; coordination form: Interactive image;
Beilstein Reference	6235525
ChEBI	CHEBI:30057;
ChemSpider	19988798;
ECHA InfoCard	100.034.303
EC Number	237-748-4;
Gmelin Reference	37363
PubChem CID	159710;
UNII	54L0T2BQF5;
UN number	1588
CompTox Dashboard (EPA)	DTXSID8044549 ;
	SMILES ionic form: [C-]#N.[C-]#N.[K+].[Au+]; coordination form: N#C[Au-]C#N.[K+];
Properties
Chemical formula	KAu(CN)2
Molar mass	288.101 g/mol
Appearance	white crystal
Density	3.45 g/cm3
Boiling point	decomposes
Solubility in water	140 g/L
Structure
Crystal structure	Rhombohedral, hR54, No. 148
Space group	R3
Lattice constant	a = 0.728 nm , b = 0.728 nm , c = 2.636 nm ; ;
Lattice volume (V)	1.2099 nm3
Formula units (Z)	9
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	toxic
	GHS labelling:
Pictograms	‍‍
Signal word	Warning
Hazard statements	H290, H300, H310, H315, H317, H318, H330, H410
Precautionary statements	P260, P264, P273, P280, P284, P301+P310
Related compounds
Other anions	Potassium silver cyanide
Other cations	Sodium gold cyanide; Calcium gold cyanide;
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
	Infobox references

Potassium gold cyanide, also called potassium dicyanoaurate, is a chemical compound. It has the chemical formula KAu(CN)₂.

Along with sodium gold cyanide and calcium gold cyanide, it part of the gold cyanidation process that separates gold from ores. It is also used in electroplating.^[3]

History

It was discovered by Carl Wilhelm Scheele, not long after he discovered cyanide. Scheele made a solution of potassium cyanide that could dissolve gold.^[3]

References

1 2 3 4 Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). CRC Press. p. 4.82. ISBN 978-1439855119.
Greenwood, N. N.; & Earnshaw, A. (1997). Chemistry of the Elements (2nd Edn.), Oxford:Butterworth-Heinemann. ISBN 0-7506-3365-4.
1 2 Williams, Graham (1978). "The cyanides of gold". Gold Bulletin. 11 (2): 56–59. doi:10.1007/BF03215451.

[crc1-1] 1 2 3 4 Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). CRC Press. p. 4.82. ISBN 978-1439855119.

[2] Greenwood, N. N.; & Earnshaw, A. (1997). Chemistry of the Elements (2nd Edn.), Oxford:Butterworth-Heinemann. ISBN 0-7506-3365-4.

[Williams-3] 1 2 Williams, Graham (1978). "The cyanides of gold". Gold Bulletin. 11 (2): 56–59. doi:10.1007/BF03215451.

[1]

[3]