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Aluminium selenide

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Formula  Al2Se3
Melting point  960 °C
Appearance  yellow to brown powder
Molar mass  290.84 g/mol
Density  3.44 g/cm³
Aluminium selenide imagesachemnetcomsupplierschembasecascas130

Aluminium selenide is the inorganic compound with the formula Al2Se3.

Contents

Preparation

It is a solid prepared by igniting a mixture of the elements at 1,000 °C (1,830 °F):

2 Al + 3 Se → Al2Se3

The pure compound is white, but typical samples are coloured. Samples of aluminium selenide must be protected from moisture, because the compound hydrolyzes readily, giving off highly toxic hydrogen selenide gas:

Al2Se3 + 3 H2O → Al2O3 + 3 H2Se

Uses

Al2Se3 has been used as a precursor to hydrogen selenide, which is released when the solid is treated with acids.

Safety

Aluminium selenide should be stored and handled away from moisture and air.

References

Aluminium selenide Wikipedia


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