Aluminium iodide

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Aluminium iodide is any chemical compound made up of only aluminium and iodine. It is formed by the reaction of aluminium and iodine,[3] or the action of hydrogen iodide on aluminium metal.

Aluminium iodide
Aluminium-iodide-3D-balls.png
Jodid hlinitý.PNG
Other names Aluminium(III) iodide

Aluminum iodide
Aluminium triiodide
Aluminum triiodide

Identifiers
CAS number 7784-23-8
PubChem 82222
EC number 232-054-8
SMILES I[Al](I)I
Properties
Molecular formula AlI3, AlI3·6H2O (hexahydrate)
Molar mass 407.695 g/mol (anhydrous)
515.786 g/mol (hexahydrate)[1]
Appearance white (anhydrous) or yellow powder (hexahydrate)[1]
Density 3.98 g/cm3 (anhydrous)[1] 2.63 g/cm3 (hexahydrate)[2]
Melting point

188.28 °C, 461 K, 371 °F

Boiling point
Solubility in water very soluble, partial hydrolysis
Solubility in alcohol, ether soluble (hexahydrate)
Structure
Crystal structure Monoclinic, mP16
Space group P21/c, No. 14
Lattice constant a = 1.1958 nm, b = 0.6128 nm, c = 1.8307 nm
Thermochemistry
Std enthalpy of
formation
ΔfHo298
-302.9 kJ/mol
Standard molar
entropy
So298
195.9 J/(mol·K)
Specific heat capacity, C 98.7 J/(mol·K)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

Sources

  1. 1.0 1.1 1.2 Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). Boca Raton, FL: CRC Press. p. 4.45. ISBN 1439855110.
  2. Perry, Dale L. (19 April 2016). Handbook of Inorganic Compounds, Second Edition. CRC Press. p. 8. ISBN 978-1-4398-1462-8.
  3. G. W. Watt, J. L. Hall (1953). Inorganic Syntheses. Vol. IV. pp. 117–119.