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Northwest Africa 2233
Basic information Name: Northwest Africa 2233
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 2233
Observed fall: No
Year found: 2003
Country: (Northwest Africa)
Mass:help 167 g
Classification
  history:
Meteoritical Bulletin:  MB 89  (2005)  Ureilite
MetBase:  v. 7.1  (2006)  Ureilite
Recommended:  Ureilite    [explanation]

This is 1 of 660 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Writeuphelp
Writeup from MB online:

Northwest Africa 2233

Northwest Africa

Found 2003

Achondrite (ureilite)

The 167 g meteorite was found in the desert. The angular stone is partly coated with dark-brown fusion crust. Mineralogy and classification (C. Lorenz and N. Kononkova, Vernad.): The rock has achondritic, coarse-grained granular texture with abundance of triple junctions, consists of olivine (Fo79.7, Fe/Mn=39.4) and orthopyroxene (En76.4 Wo1.3, Fe/Mn=23.8), minor clinopyroxene (En45.6 Wo43.4), rare metal (2.25 wt% Ni, Ni/Co=7.2), troilite and chromite. The olivines are replaced with fine-grained aggregate of troilite and pyroxene (En78.8 Wo1.1) developed along the grain borders and cracks, and show local reduction around replaced areas. Specimens: type specimen, 20.5 g, and thin section, Vernad; main mass with anonymous finder.

Data from:
  MB89
  Table 7
  Line 135:
Date:2003
Mass (g):167
Pieces:1
Class:Ure
Fayalite (mol%):20.3
Ferrosilite (mol%):76.4
Type spec mass (g):20.5
Comments:Rare metal: 2.25%Ni, Ni/Co 7.2; Undefined note. Could mean Vernadsky Institute
Institutions
   and collections		 Vernad: Vernadsky Institute of Geochemistry and Analytical Chemistry, Russia (institutional address; updated 21 Feb 2016)
Catalogs:
References: Published in Meteoritical Bulletin, no. 89, MAPS 40, A201-A263 (2005)
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)
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Revision
  history:
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