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Northwest Africa 5474
Basic information Name: Northwest Africa 5474
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 5474
Observed fall: No
Year found: 2008
Country: (Northwest Africa)
Mass:help 58 g
Classification
  history:
Meteoritical Bulletin:  MB 106  (2018)  Eucrite-pmict
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 348 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 26 Sep 2017
Writeuphelp
Writeup from MB 106:

Northwest Africa 5474 (NWA 5474)

(Northwest Africa)

Purchased: 2008

Classification: HED achondrite (Eucrite, polymict)

History: The meteorite was bought in 2008 from a Moroccan meteorite dealer in Erfoud, Morocco.

Physical characteristics: Grayish individual lacking any fusion crust.

Petrography: The meteorite is a breccia composed of basaltic, dark impact melt, and mineral clasts set into a fine-grained clastic matrix. Clasts and matrix are dominantly composed of exsolved pyroxene and plagioclase up to 1 mm in size. Minor phases include chromite, fayalite, pyrrhotite, silica, and metallic iron.

Geochemistry: Low-Ca pyroxene: Fs26.8±1.6Wo3.4±0.7 (Fs21.5-28.7Wo2.0-4.2, n=15, FeO/MnO=29-36); Ca-pyroxene: Fs26.1±1.4Wo42.4±0.8 (Fs23.8-28.2Wo40.4-43.0, n=18, FeO/MnO=30-39); calcic plagioclase: An90.3±3.8 (An79.4-95.8, n=17)

Data from:
  MB106
  Table 0
  Line 0:
Place of purchase:Erfoud, Morocco
Date:P 2008
Mass (g):58
Pieces:1
Class:Eucrite-pmict
Shock stage:moderate
Weathering grade:low
Ferrosilite (mol%):26.8; 26.1
Wollastonite (mol%):3.4; 42.4
Classifier:A. Greshake, MNB
Type spec mass (g):11.8
Type spec location:MNB
Main mass:Stefan Ralew
Comments:Submitted by Ansgar Greshake
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Ralew: Stefan Ralew, Kunibertstraße 29, 12524 Berlin, Germany; Website (private address)
Catalogs:
References: Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
André Knöfel   
Dirk Hohmann      
Geography: 
Coordinates:Unknown.

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

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