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Northwest Africa 6997
Basic information Name: Northwest Africa 6997
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 6997
Observed fall: No
Year found: 2004
Country: (Northwest Africa)
Mass:help 110.5 g
Classification
  history:
Meteoritical Bulletin:  MB 101  (2012)  L4-5
Recommended:  L4-5    [explanation]

This is 1 of 27 approved meteorites classified as L4-5.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 7 Jul 2012
Data from:
  MB101
  Table 0
  Line 0:
Place of purchase:Tucson
Date:P 2004
Mass (g):110.5
Pieces:2
Class:L4-5
Shock stage:S6
Weathering grade:W2
Fayalite (mol%):24.6±0.9 (n = 60)
Ferrosilite (mol%):20.8±0.9 (n = 12)
Wollastonite (mol%):1.6±0.2
Classifier:B. Hyde, ROM
Type spec mass (g):110.5
Type spec location:ROM
Main mass:ROM
Comments:Contains ringwoodite; submitted by Kim Tait
Institutions
   and collections
ROM: Royal Ontario Museum, 100 Queen's Park, Toronto, Ontario M5S 2C6, Canada (institutional address; updated 18 Oct 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 101, MAPS 50, 1661, September 2015
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6900 approved meteorites from (Northwest Africa) (plus 2027 unapproved names)

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