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== Referències ==
== Referències ==
* Brady, George Stuart; Clauser, Henry R. and Vaccari, John A. (24 de julio de 2002). Materials handbook: an encyclopedia for managers, technical professionals, purchasing and production managers, technicians, and supervisors. McGraw-Hill Professional. pp. 1063-. ISBN 978-0-07-136076-0
* [https://www.etymonline.com/word/zircon Harper, Douglas. «zircon». Online Etymology Dictionary]
* [https://www.etymonline.com/word/zircon Harper, Douglas. «zircon». Online Etymology Dictionary]
* Winter, Mark (2007). «Electronegativity (Pauling)». University of Sheffield
* Winter, Mark (2007). «Electronegativity (Pauling)». University of Sheffield
* [https://www.usgs.gov/centers/national-minerals-information-center/zirconium-and-hafnium-statistics-and-information «Zirconium and Hafnium» (PDF). Mineral Commodity Summaries (US Geological Survey): 192-193]
== Bibliografia ==
== Bibliografia ==