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 ...
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an iron nickel carbide mineral [(Fe,Ni)3C] that occurs as an accessory constituent of iron meteorites, including all coarse octahedrites containing 7 ...
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http://www.britannica.com/eb/a-z/c/106
a rare microscopic mineral, carbide of iron, nickel, or cobalt, (Fe, Ni, Co)C, found in lunar rocks and some meteorites.
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https://www.infoplease.com/dictionary/cohenite
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