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Northwest Africa 8475
Basic information Name: Northwest Africa 8475
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8475
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 34 g
Classification
  history:
Meteoritical Bulletin:  MB 103  (2014)  Eucrite-cm
Recommended:  Eucrite-cm    [explanation]

This is 1 of 55 approved meteorites classified as Eucrite-cm.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 18 Jul 2014
Writeuphelp
Writeup from MB 103:

Northwest Africa 8475 (NWA 8475)

(Northwest Africa)

Purchased: 2013 Feb

Classification: HED achondrite (Eucrite, cumulate)

History: Purchased in 2013 in Tucson.

Physical characteristics: A single stone without fusion crust. Cut surface reveals a gray interior.

Petrography: (J. Gattacceca, CEREGE) Protogranular crystalline rock dominated by pyroxene and plagioclase with typical grain size 1 to 1.5 mm. Accessory silica (often containing kamacite inclusions up to 5 μm), troilite (up to 250 μm), chromite, kamacite.

Geochemistry: Pigeonite Fs47.8±1.6Wo8.3±2.1, FeO/MnO= 32.1±1.0 (N=5). Augite Fs29.5±0.8Wo34.0±1.2, FeO/MnO= 28.8±1.8 (n=5). Plagioclase An90.6±0.2Ab 9.1±0.2Or 0.3±0.0 (N=6). Magnetic susceptibility log χ = 2.66 (χ in 10-9 m3/kg).

Classification: Achondrite (cumulate eucrite). Moderate weathering.

Specimens: 7 g in CEREGE, main mass with Labenne

Data from:
  MB103
  Table 0
  Line 0:
Place of purchase:Tucson
Date:P 2013 Feb
Mass (g):34
Pieces:1
Class:Eucrite-cm
Weathering grade:moderate
Ferrosilite (mol%):47.8±1.6 - 29.5±0.8
Wollastonite (mol%):8.3±2.1 - 34.0±1.2
Magnetic suscept.:2.66
Classifier:J. Gattacceca, CEREGE
Type spec mass (g):7
Type spec location:CEREGE
Main mass:Labenne Luc
Comments:Submitted by J. Gattacceca
Institutions
   and collections		 CEREGE: CEREGE BP 80 Avenue Philibert, Technopole de l'Arbois 13545 Aix-en-Provence Cedex 4 France, France (institutional address; updated 29 Oct 2018)
Labenne: 23, rue de Esperance, 75013 Paris, France; Website (private address; updated 29 Aug 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9116 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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