Aluminium selenide
Aluminium selenide, also known as aluminum selenide or aluminium(III) selenide, is a chemical compound. Its chemical formula is Al2Se3. It contains aluminium in its +3 oxidation state. It contains aluminium and selenide ions.
| Aluminium selenide[1] | |
|---|---|
| |
| Other names | Aluminium(III) selenide |
| Identifiers | |
| CAS number | |
| PubChem | |
| EC number | 215-110-6 |
| SMILES | [Al+3].[Al+3].[Se-2].[Se-2].[Se-2] |
| Properties | |
| Molecular formula | Al2Se3 |
| Molar mass | 290.84 g/mol |
| Appearance | yellow to brown powder |
| Odor | odorless |
| Density | 3.437 g/cm3 |
| Melting point |
947 °C, 1220 K, 1737 °F |
| Solubility in water | decomposes |
| Structure | |
| Crystal structure | Monoclinic, mS20, Space group Cc, No. 9[2] |
| Thermochemistry | |
| Std enthalpy of formation ΔfH |
-566.9 kJ/mol |
| Standard molar entropy S |
154.8 J/mol K |
| Hazards | |
| EU classification | not listed |
| NFPA 704 |
0
3
3
|
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) | |
Properties
It reacts with water to make hydrogen selenide. It is a reducing agent and can burn to make aluminium oxide and selenium dioxide.
Preparation
It is made by reacting selenium with aluminium powder at a high temperature.
Uses
It is used to make hydrogen selenide.
Related pages
References
- ↑ Lide, David R. (1998). Handbook of Chemistry and Physics (87 ed.). Boca Raton, FL: CRC Press. pp. 4–40. ISBN 0-8493-0594-2.
- ↑ Steigmann, G. A.; Goodyear, J. (1966). "The crystal structure of Al2Se3". Acta Crystallographica. 20 (5): 617–619. doi:10.1107/S0365110X66001506.