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Northwest Africa 5558
Basic information Name: Northwest Africa 5558
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 5558
Observed fall: No
Year found: 2008
Country: (Northwest Africa)
Mass:help 38.6 g
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  Eucrite
Recommended:  Eucrite    [explanation]

This is 1 of 560 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 16 Mar 2016
Writeuphelp
Writeup from MB 105:

Northwest Africa 5558 (NWA 5558)

(Northwest Africa)

Purchased: 2008

Classification: HED achondrite (Eucrite)

History: The meteorite was bought in 2008 on a mineral fair in Ensisheim, France.

Petrography: The meteorite shows a basaltic texture of up to 0.5 mm sized often lath-shaped plagioclase grains and more fine-grained exsolved pyroxene. Minor phases include chromite, pyrrhotite and silica.

Geochemistry: low-Ca pyroxene: Fs57.9±0.2Wo6.2±0.1 n=16 (Fs57.5-58.1Wo6.1-6.5, n=15, FeO/MnO=31-34); Ca-pyroxene: Fs29.3±0.4Wo41.3±0.4 (Fs28.7-30Wo40.6-42, n=16, FeO/MnO=34-38); calcic plagioclase: An90.1±1.3 (An87.2-91.8, n=18)

Data from:
  MB105
  Table 0
  Line 0:
Origin or pseudonym:SJS-08025
Place of purchase:Ensisheim, France
Date:P 2008
Mass (g):38.6
Pieces:1
Class:Eucrite
Shock stage:moderate
Weathering grade:low
Ferrosilite (mol%):57.9; 29.3
Wollastonite (mol%):6.2; 41.3
Classifier:A. Greshake, MNB
Type spec mass (g):8.1
Type spec location:MNB
Main mass:Marc Jost
Comments:Submitted by Ansgar Greshake
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
Find references in NASA ADS:
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
André Knöfel Photo added 19 Apr 2022
Dirk Hohmann Photo added 19 Apr 2022
Photo added 19 Apr 2022
Photo added 19 Apr 2022
Photo added 19 Apr 2022
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8559 approved meteorites from (Northwest Africa) (plus 1896 unapproved names)

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