cohenite

cohenite
/koh"euh nuyt'/, n.
a rare microscopic mineral, carbide of iron, nickel, or cobalt, (Fe, Ni, Co)3C, found in lunar rocks and some meteorites.
[named after E. W. Cohen, 19th-century German mineralogist; see -ITE1]

* * *

      an iron nickel carbide mineral [(Fe,Ni)3C] that occurs as an accessory constituent of iron meteorites, including all coarse octahedrites containing 7 percent nickel or less, and that is a rare constituent of some chondritic stony meteorites and micrometeorites. Another iron nickel carbide, haxonite [(Fe,Ni)23C6], also occurs in these meteorites. Cohenite closely resembles another meteoritic mineral, schreibersite, and it may be more common in meteorites than is supposed. When manufactured on Earth, as in steel, it is called cementite. For detailed physical properties, see native element (table).

* * *


Universalium. 2010.

Игры ⚽ Нужно решить контрольную?

Look at other dictionaries:

  • Cohenite — General Category Carbides Chemical formula (Fe,Ni,Co)3C Strunz classification 01.BA.05 …   Wikipedia

  • cohenite — co·hen·ite …   English syllables

  • cohenite — ˈkōə̇ˌnīt noun ( s) Etymology: German cohenit, from Emil Cohen died 1905 German mineralogist + German it ite : a tin white crystalline mineral (Fe,Ni,Co)3C consisting of a carbide of iron, nickel, and cobalt and occurring in some meteorites * * * …   Useful english dictionary

  • Cohenita — General Categoría Minerales elementos Clase 1.BA.05 (Strunz) Fórmula química (Fe,Ni,Co)3C Propiedades físicas …   Wikipedia Español

  • List of minerals C-E (complete) — It is currently not possible to have a complete list of minerals . The International Mineralogical Association is the international group that recognises new minerals and new mineral names, however minerals discovered before 1959 did not go… …   Wikipedia

  • Cohenit — Chemische Formel (Fe,Ni,Co)3C Mineralklasse Elemente Metallische Kohlenstoff , Stickstoff und Phosphorverbindungen 1.BA.05 (8. Aufl.: I/A.09 50) (nach Strunz) 01.01.16.01 (nach Dana) Kristallsystem orthorhombisch Kristallklasse …   Deutsch Wikipedia

  • Native elements — ▪ Table Native elements name colour lustre Mohs hardness specific gravity habit or form allemontite tin white; reddish gray metallic 3–4 5.8–6.2 kidneylike masses amalgam gold amalgam yellowish metallic 15.5 lumps or grains moschellandsbergite… …   Universalium

  • Telluric iron — Telluric iron, also called native iron, is iron that originated on Earth, but is found in a metallic form rather than as an ore. Telluric iron is extremely rare, with only one known major deposit in the world, located in Greenland. Contents 1… …   Wikipedia

  • Octahedrite — from Toluca Widmanstätten …   Wikipedia

  • Cementite — or iron carbide is a chemical compound with the formula Fe3C (or Fe2C:Fe), and an orthorhombic crystal structure. It is a hard, brittle material, normally classified as a ceramic in its pure form, though it is more important in metallurgy. It… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”