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・ Cohen Saves the Flag
・ Cohen Stadium
・ Cohen structure theorem
・ Cohen syndrome
・ Cohen v Segal
・ Cohen v. Beneficial Industrial Loan Corp.
・ Cohen v. California
・ Cohen v. Cowles Media Co.
・ Cohen vs. Rosi
・ Cohen's cryptosystem
・ Cohen's Fashion Optical
・ Cohen's h
・ Cohen's horseshoe bat
・ Cohen's kappa
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Cohenite
・ Cohennoz
・ Cohens v. Virginia
・ Cohen–Hewitt factorization theorem
・ Cohen–Macaulay ring
・ Cohen–Sutherland algorithm
・ Coherence
・ Coherence (film)
・ Coherence (linguistics)
・ Coherence (philosophical gambling strategy)
・ Coherence (physics)
・ Coherence (signal processing)
・ Coherence (statistics)
・ Coherence (units of measurement)
・ Coherence (UPNP)


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Cohenite : ウィキペディア英語版
Cohenite

Cohenite is a naturally occurring iron carbide mineral with the chemical structure (Fe, Ni, Co)3C. This forms a hard, shiny, silver mineral which was named by E. Weinschenk in 1889 after the German mineralogist Emil Cohen, who first described and analysed material from the Magura meteorite found near Slanica, Žilina Region, Slovakia.〔 Cohenite is found in rod-like crystals in iron meteorites.〔Vagn F. Buchwald, ''Handbook of Iron Meteorites,'' University of California Press, 1975 ISBN 978-0520029347〕
On Earth cohenite is stable only in rocks which formed in a strongly reducing environment and contain native iron deposits. Such conditions existed in some places where molten magmas invaded coal deposits, e.g. on Disco Island in Greenland, or at the Bühl near Kassel in Germany.〔
Associated minerals include native iron, schreibersite, troilite and wustite.〔
Similar iron carbides occur also in technical iron alloys and are called cementite.
==See also==

* Glossary of meteoritics
*List of minerals
*List of minerals named after people

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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