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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 425 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)
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   
Dirk Hohmann            
Solar Anamnesis   
Space Jewels   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6846 approved meteorites from (Northwest Africa) (plus 2038 unapproved names)

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