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Strontium oxide
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<h2 id="uses">Uses</h2> <p>About 8% by weight of <a href="/facts/Cathode-ray_tube/8NVGx5C7">cathode-ray tubes</a> is strontium oxide, which has been the major use of strontium since 1970.<a class="footnote-ref" id="fnref:1" href="#fn:1"><sup>1</sup></a><a class="footnote-ref" id="fnref:2" href="#fn:2"><sup>2</sup></a> Color televisions and other devices containing color cathode-ray tubes sold in the United States are required by law to use strontium in the faceplate to block <a href="/facts/X-ray/wseP79cN">X-ray</a> emission (these X-ray emitting TVs are no longer in production). <a href="/facts/Lead(II)_oxide/ekk8cog0">Lead(II) oxide</a> can be used in the neck and funnel, but causes discoloration when used in the faceplate.<a class="footnote-ref" id="fnref:3" href="#fn:3"><sup>3</sup></a> </p> <h2 id="reactions">Reactions</h2> <p>Elemental strontium is formed when strontium oxide is heated with <a href="/facts/Aluminium/7wmR8jYE">aluminium</a> in a vacuum.<a class="footnote-ref" id="fnref:4" href="#fn:4"><sup>4</sup></a> </p> <h2 id="external-links">External links</h2> <ul><li><a href="https://web.archive.org/web/20060909182921/http://ceramic-materials.com/cermat/oxide/sro.html">Hansen, Tony, "SrO (Strontium Oxide, Strontia)", ceramic-materials.com</a></li></ul> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>Ober, Joyce A.; Polyak, Désirée E. "Mineral Yearbook 2007:Strontium" (PDF). United States Geological Survey. Retrieved 2009-09-14. <a href="https://minerals.usgs.gov/minerals/pubs/commodity/strontium/myb1-2007-stron.pdf" target="_blank">https://minerals.usgs.gov/minerals/pubs/commodity/strontium/myb1-2007-stron.pdf</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>Minerals Yearbook. Bureau of Mines. May 8, 2011. ISBN 9781411332270 – via Google Books. <a href="9781411332270" target="_blank">9781411332270</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> <li id="fn:3"><p>Méar, F; Yot, P; Cambon, M; Ribes, M (2006). "The characterization of waste cathode-ray tube glass". Waste Management. 26 (12): 1468–76. Bibcode:2006WaMan..26.1468M. doi:10.1016/j.wasman.2005.11.017. ISSN 0956-053X. PMID 16427267. <a href="/wiki/Bibcode_(identifier)" target="_blank">/wiki/Bibcode_(identifier)</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li> <li id="fn:4"><p>Lide, David R. (1998). Handbook of Chemistry and Physics (87 ed.). Boca Raton, Florida: CRC Press. pp. 4–87. ISBN 0-8493-0594-2. <a href="0-8493-0594-2" target="_blank">0-8493-0594-2</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></p></li> </ol>