Gold monoiodide

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Gold monoiodide
AuI structure.png
CAS number 10294-31-2
PubChem 82526
ChemSpider 74478 YesY
Jmol-3D images Image 1
Molecular formula AuI
Molar mass 323.871 g/mol
Appearance Yellowish to greenish-yellow powder
Density 8.25 g/cm3[1]
Crystal structure tetragonal, Pearson symbol tP8, Z = 4
Space group P42/ncm (No. 138)[1]
Lattice constant a = 0.435, b = 0.435, c = 1.373 nm
EU classification Irritant Xi
R-phrases R36/37/38
S-phrases S26, S37/39
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

Gold monoiodide (AuI) is a chemical compound of gold and iodine. It is the only known binary iodide of gold. This compound is commercially available. It can be synthesized by heating gold and iodine in a sealed tube at 120°C for about four months. It decomposes when treated with hot water.[2] But its related complexes are much more stable.[3]


  1. ^ a b Jagodzinski H. (1959). Z. Kristallogr. 112: 80–87. 
  2. ^ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 0080379419. 
  3. ^ Tang, Zhongjia; Litvinchuk, A. P.; Lee, Hye-G.; Guloy, Arnold M. (1 September 1998). "Crystal Structure and Vibrational Spectra of a New Viologen Gold(I) Iodide". Inorganic Chemistry 37 (19): 4752–4753. doi:10.1021/ic980141q.