Potassium dicyanoaurate

Potassium dicyanoaurate
Names
IUPAC name
Potassium dicyanoaurate(I)
Other names
potassium cyanoaurate[1]
potassium gold cyanide
potassium gold dicyanide
Identifiers
3D model (JSmol)
6235525
ChEBI
ChemSpider
ECHA InfoCard 100.034.303 Edit this at Wikidata
EC Number
  • 237-748-4
37363
UNII
UN number 1588
  • InChI=1S/2CN.Au.K/c2*1-2;;/q2*-1;2*+1
    Key: XTFKWYDMKGAZKK-UHFFFAOYSA-N
  • ionic form: [C-]#N.[C-]#N.[K+].[Au+]
  • coordination form: N#C[Au-]C#N.[K+]
Properties
KAu(CN)2
Molar mass 288.101 g/mol
Appearance white crystal[1]
Density 3.45 g/cm3[1]
Boiling point decomposes
140 g/L[1]
Structure
Rhombohedral, hR54, No. 148
R3
a = 0.728 nm, b = 0.728 nm, c = 2.636 nm
1.2099 nm3
9
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 toxic
GHS labelling:
GHS05: CorrosiveGHS06: ToxicGHS09: Environmental hazard
Warning
H290, H300, H310, H315, H317, H318, H330, H410
P260, P264, P273, P280, P284, P301+P310
Related compounds
Other anions
 Potassium argentocyanide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Potassium dicyanoaurate (or potassium gold cyanide) is an inorganic compound with formula K[Au(CN)2]. It is a colorless to white solid that is soluble in water and slightly soluble in alcohol. The salt itself is often not isolated, but solutions of the dicyanoaurate ion ([Au(CN)2]−) are generated on a large scale in the extraction of gold from its ores.[3]

  1. ^ a b c d 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.
  3. ^ Rosenzweig, A.; Cromer, D. T. (1959). "The Crystal Structure of KAu(CN)2". Acta Crystallographica. 12 (10): 709–712. Bibcode:1959AcCry..12..709R. doi:10.1107/S0365110X59002109.