Editing Boron (section)

===Preparation===
Elemental boron is rare and poorly studied because the pure material is extremely difficult to prepare. Most studies of "boron" involve samples that contain small amounts of carbon. Very pure boron is produced with difficulty because of contamination by carbon or other elements that resist removal.<ref>{{cite book |last1=Hobbs |first1=Dale Z. |last2=Campbell |first2=Thomas T. |last3=Block |first3=F. E. |title=Methods Used in Preparing Boron |date=1964 |publisher=U.S. Department of the Interior, Bureau of Mines |page=14 |url=https://books.google.com/books?id=37NtbclQPRgC&pg=PA14 |language=en |access-date=25 February 2022 |archive-date=8 March 2024 |archive-url=https://web.archive.org/web/20240308024312/https://books.google.com/books?id=37NtbcongborlQPRgC&pg=PA14#v=onepage&q&f=false |url-status=live }}</ref>

Some early routes to elemental boron involved the reduction of [[boric oxide]] with metals such as [[magnesium]] or [[aluminium]]. However, the product was often contaminated with [[boride]]s of those metals.<ref>{{Cite book |last=Springborg |first=Michael |url=https://books.google.com/books?id=JHMoDwAAQBAJ |title=Chemical Modelling: Applications and Theory Volume 8 |date=1 September 2011 |publisher=Royal Society of Chemistry |isbn=978-1-84973-278-9 |pages=2–3 |language=en}}</ref> Pure boron can be prepared by reducing volatile boron halides with [[hydrogen]] at high temperatures. Ultrapure boron for use in the semiconductor industry is produced by the decomposition of [[diborane]] at high temperatures and then further purified by the [[zone melting]] or [[Czochralski process]]es.<ref name="berger">{{Cite book| title = Semiconductor materials| author = Berger, L. I.| publisher = CRC Press| date = 1996| isbn = 978-0-8493-8912-2| pages = [https://archive.org/details/semiconductormat0000berg/page/37 37–43]| url = https://archive.org/details/semiconductormat0000berg/page/37}}</ref>