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Aluminium selenide
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<h2 id="preparation">Preparation</h2> <p>It is a solid prepared by igniting a mixture of the elements at 1,000 °C (1,830 °F): </p> 2 Al + 3 Se → Al2Se3 <p>The pure compound is white, but typical samples are coloured.<a class="footnote-ref" id="fnref:1" href="#fn:1"><sup>1</sup></a> Samples are usually protected from moisture, because they hydrolyze readily, giving off highly toxic <a href="/facts/Hydrogen_selenide/l2Pn2wJo">hydrogen selenide</a> gas:<a class="footnote-ref" id="fnref:2" href="#fn:2"><sup>2</sup></a> </p> Al2Se3 + 3 H2O → Al2O3 + 3 H2Se <h2 id="use">Use</h2> <p>Al2Se3 has been used as a precursor to hydrogen selenide, which is released when the solid is treated with acids.<a class="footnote-ref" id="fnref:3" href="#fn:3"><sup>3</sup></a> </p> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>Waitkins, G. R.; Shutt, R. (1946). "Aluminum Selenide and Hydrogen Selenide". Inorganic Syntheses. Vol. 2. pp. 183–186. doi:10.1002/9780470132333.ch55. ISBN 9780470132333. <a href="9780470132333" target="_blank">9780470132333</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>Langner, Bernd E. (2005) "Selenium and Selenium Compounds" in Ullmann's Encyclopedia of Industrial Chemistry, Wiley-VCH, Weinheim. doi:10.1002/14356007.a23_525 <a href="/wiki/Doi_(identifier)" target="_blank">/wiki/Doi_(identifier)</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> <li id="fn:3"><p>Waitkins, G. R.; Shutt, R. (1946). "Aluminum Selenide and Hydrogen Selenide". Inorganic Syntheses. Vol. 2. pp. 183–186. doi:10.1002/9780470132333.ch55. ISBN 9780470132333. <a href="9780470132333" target="_blank">9780470132333</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li> </ol>