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Northwest Africa 6731
Basic information Name: Northwest Africa 6731
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 6731
Observed fall: No
Year found: 2007
Country: (Northwest Africa)
Mass:help 13.7 g
Classification
  history:
Meteoritical Bulletin:  MB 101  (2012)  Eucrite-cm
Recommended:  Eucrite-cm    [explanation]

This is 1 of 49 approved meteorites classified as Eucrite-cm.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 11 Aug 2012
Writeuphelp
Writeup from MB 101:

Northwest Africa 6731 (NWA 6731)

(Northwest Africa)

Purchased: 2007 Feb

Classification: HED achondrite (Eucrite, cumulate)

History: One small stone was purchased in Erfoud in February 2007

Physical characteristics: One partly crusted 13.7 g stone.

Petrography: (R. Bartoschewitz, Bart) Monomict breccia of subhedral pyroxene and plagioclase crystals (<1 mm) in a finer grained matrix and melt pockets. Ilmenite occurs as clusters of tiny crystals. Further accessory minerals are olivine, silica and troilite.

Geochemistry: (R. Bartoschewitz, Bart; P. Appel, B. Mader, Kiel) Ca-poor pyroxene Fs52.7-60.1Wo3.2-4.8, Ca-rich pyroxene Fs29.6-60.1Wo43-6.1, olivine Fa75.1, feldspar An71-92Or<2.8. Kamacite Ni <0.1 wt%, Co=1.1 wt%, ilmenite, troilite, and silica.

Classification: Cumulate eucrite (fresh)

Specimens: Type specimens 2.75 g Kiel; 1.5 g Bart.

Data from:
  MB101
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P 2007 Feb
Mass (g):13.7
Pieces:1
Class:Eucrite-cm
Fayalite (mol%):76.1
Ferrosilite (mol%):57.1 (52.7-60.1)
Wollastonite (mol%):3.2-4.8
Magnetic suscept.:2.94
Classifier:R. Bartoschewitz, Bart; P. Appel, B. Mader, Kiel
Type spec mass (g):2.75
Type spec location:Kiel
Main mass:Bilet
Finder:anonymous
Comments:Submitted by Bartoschewitz
Institutions
   and collections		 Kiel: Geologisches und Mineralogisches Museum, Institut für Geowissenschaften, Christian-Albrechts-Universität Kiel, Ludewig-Mayn-Str. 10, D-24118 Kiel, Germany, Germany (institutional address; updated 13 Sep 2013)
Bart: Bartoschewitz Meteorite Laboratory, Weiland 37, D-38518 Gifhorn, Germany; Website (private address; updated 30 Nov 2019)
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 7820 approved meteorites from (Northwest Africa) (plus 1971 unapproved names)

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