Aluminium selenide
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Through Chemical formula and Aluminium
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 are usually protected from moisture, because they hydrolyze readily, giving off highly toxic hydrogen selenide gas:
- Al2Se3 + 3 H2O → Al2O3 + 3 H2Se
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Use
Al2Se3 has been used as a precursor to hydrogen selenide, which is released when the solid is treated with acids.