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Northwest Africa 4991
Basic information Name: Northwest Africa 4991
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4991
Observed fall: No
Year found: 2005
Country: (Northwest Africa)
Mass:help 210 g
Classification
  history:
Meteoritical Bulletin:  MB 93  (2008)  L4-6
Recommended:  L4-6    [explanation]

This is 1 of 44 approved meteorites (plus 1 unapproved name) classified as L4-6.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 6 Mar 2008
Data from:
  MB93
  Table 2
  Line 167:
Place of purchase:Morocco
Date:2005
Mass (g):210
Pieces:1
Class:L4-6
Shock stage:S3
Weathering grade:W1-2
Fayalite (mol%):25.9
Ferrosilite (mol%):9.9-22.8
Classifier:A. Greshake, MNB
Type spec mass (g):22.3
Type spec location:MNB
Main mass:Stehlik
Institutions
   and collections
MNB: Museum f├╝r Naturkunde, Invalidenstra├če 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Stehlik: Harald Stehlik, 1220 Wien, Austria (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 93, MAPS 43, 571-632 (2008)
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7385 approved meteorites from (Northwest Africa) (plus 1955 unapproved names)

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