出典:Wiktionary
出典:『Wiktionary』 (2025/06/15 17:14 UTC 版)
coesite (countable and uncountable, plural coesites)
出典:Wikipedia
出典:『Wikipedia』 (2011/04/03 18:13 UTC 版)
Coesite is a form (polymorph) of silicon dioxide SiO2 that is formed when very high pressure (2–3 gigapascals), and moderately high temperature (700 °C or 1,300 °F), are applied to quartz. Coesite was first synthesized by Loring Coes, Jr., a chemist at the Norton Company, in 1953. In 1960, coesite was found by Edward C. T. Chao, in collaboration with Eugene Shoemaker, to naturally occur in the Barringer Crater, which was evidence that the crater must have been formed by an impact.