Aluminium iodide |
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Other names | Aluminium(III) iodide
Aluminum iodide Aluminium triiodide Aluminum triiodide |
Identifiers |
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CAS number | 7784-23-8 |
PubChem | 82222 |
EC number | 232-054-8 |
SMILES | I[Al](I)I |
Properties |
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Molecular formula | AlI3, AlI3·6H2O (hexahydrate) |
Molar mass | 407.695 g/mol (anhydrous) 515.786 g/mol (hexahydrate) |
Appearance | white (anhydrous) or yellow powder (hexahydrate) |
Density | 3.98 g/cm3 (anhydrous) 2.63 g/cm3 (hexahydrate) |
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 |
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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 |
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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) |