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Northwest Africa 6840
Basic information Name: Northwest Africa 6840
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 6840
Observed fall: No
Year found: 2010
Country: (Northwest Africa)
Mass:help 21 g
Classification
  history:
Recommended:  Pallasite    [explanation]

This is 1 of 51 approved meteorites classified as Pallasite.   [show all]
Search for other: Metal-rich meteorites, Pallasites
Comments: Approved 20 Oct 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 6840 (NWA 6840)

(Northwest Africa)

Purchased: 2010

Classification: Pallasite

History: The meteorite was purchased from a local meteorite dealer in Erfoud, Morocco.

Physical characteristics: Dark brownish fragment without fusion crust.

Petrography: The meteorite is composed of about 4 mm sized subrounded olivine grains surrounded by a matrix of partly layered brownish iron oxides or hydroxides. No pristine FeNi-metal has been found in the sample studied.

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Erfoud, Morocco
Date:P 2010
Mass (g):21
Pieces:1
Class:Pallasite
Shock stage:low
Weathering grade:high
Fayalite (mol%):12.6±0.1 (n=19)
Classifier:A. Greshake, MNB
Type spec mass (g):5
Type spec location:MNB
Main mass:Hanno Strufe
Comments:Submitted by Ansgar Greshake
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstrasse 43, D-10115 Berlin, Germany (institutional address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 108, in preparation (2019)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7005 approved meteorites from (Northwest Africa) (plus 2002 unapproved names)

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