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Caesium bromide
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<h2 id="synthesis">Synthesis</h2> <p>Caesium bromide can be prepared via following reactions: </p> <ul><li><a href="/facts/Neutralization_(chemistry)/WC1c5fj1">Neutralization</a>:</li></ul> CsOH (aq) + HBr (aq) → CsBr (aq) + H2O (l) Cs2(CO3) (aq) + 2 HBr (aq) → 2 CsBr (aq) + H2O (l) + CO2 (g) <ul><li>Direct synthesis:</li></ul> 2 Cs (s) + Br2 (g) → 2 CsBr (s) <p>The direct synthesis is a vigorous reaction of caesium with bromine. Due to its high cost, it is not used for preparation. </p> <h2 id="uses">Uses</h2> <p>Caesium bromide is sometimes used in optics as a <a href="/facts/Beamsplitter/3PFoofER">beamsplitter</a> component in wide-band <a href="/facts/Spectrophotometers/hhjdQYvf">spectrophotometers</a>. </p> <p>* <a href="http://www.crystran.co.uk/caesium-bromide-csbr.htm">Crystran Ltd experimental data July 2021</a> <a href="https://web.archive.org/web/20121218002818/http://www.crystran.co.uk/caesium-bromide-csbr.htm">Archived</a> 2012-12-18 at the <a href="/facts/Wayback_Machine/nmQ3a6JC">Wayback Machine</a> </p><h2 id="cited-sources">Cited sources</h2> <ul><li>Haynes, William M., ed. (2011). <i><a href="/facts/CRC_Handbook_of_Chemistry_and_Physics/qjxzC2Cu">CRC Handbook of Chemistry and Physics</a></i> (92nd ed.). Boca Raton, Florida: <a href="/facts/CRC_Press/duTuH4hz">CRC Press</a>. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 1-4398-5511-0.</li></ul> <h2 id="external-links">External links</h2> Wikimedia Commons has media related to Caesium bromide. <ul><li><a href="http://physchem.ox.ac.uk/MSDS/CA/caesium_bromide.html">MSDS at Oxford University</a> <a href="https://web.archive.org/web/20071017044744/http://physchem.ox.ac.uk/MSDS/CA/caesium_bromide.html">Archived</a> 2007-10-17 at the <a href="/facts/Wayback_Machine/nmQ3a6JC">Wayback Machine</a></li> <li><a href="http://www.crystran.co.uk/caesium-bromide-csbr.htm">Crystran Physical data</a> <a href="https://web.archive.org/web/20121218002818/http://www.crystran.co.uk/caesium-bromide-csbr.htm">Archived</a> 2012-12-18 at the <a href="/facts/Wayback_Machine/nmQ3a6JC">Wayback Machine</a>, <a href="https://web.archive.org/web/20070927230133/http://www.korth.de/transmiss/csbr.htm">IR transmission spectrum</a></li> <li><a href="http://doc.cern.ch/tmp/convert_SCAN-9806049.pdf">Ultra-violet photoabsorption measurements in alkali iodide and caesium bromide evaporated films</a></li></ul> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>Schulz, L. G. (1951). "Polymorphism of cesium and thallium halides". Acta Crystallographica. 4 (6): 487–489. Bibcode:1951AcCry...4..487S. doi:10.1107/S0365110X51001641. <a href="/wiki/Bibcode_(identifier)" target="_blank">/wiki/Bibcode_(identifier)</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> </ol>