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Northwest Africa 5475
Basic information Name: Northwest Africa 5475
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 5475
Observed fall: No
Year found: 2008
Country: (Northwest Africa)
Mass:help 178 g
Classification
  history:
Meteoritical Bulletin:  MB 106  (2018)  CK5
Recommended:  CK5    [explanation]

This is 1 of 181 approved meteorites classified as CK5.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites
Comments: Approved 26 Sep 2017
Writeuphelp
Writeup from MB 106:

Northwest Africa 5475 (NWA 5475)

(Northwest Africa)

Purchased: 2008

Classification: Carbonaceous chondrite (CK5)

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 displays a dark greenish to grayish interior and is composed of several clearly defined chondrules and rare CAIs set into abundant recrystallized matrix dominantly composed of ferroan olivine. Minor phases include feldspar, low-Ca pyroxene and Cr-bearing magnetite. Metal was not detected.

Data from:
  MB106
  Table 0
  Line 0:
Place of purchase:Erfoud, Morocco
Date:P 2008
Mass (g):178
Pieces:1
Class:CK5
Shock stage:S1
Weathering grade:W2
Fayalite (mol%):30.8±0.2 (n=15)
Ferrosilite (mol%):26.2±0.2 (n=10)
Wollastonite (mol%):0.7±0.1 (n=10)
Classifier:A. Greshake, MNB
Type spec mass (g):20.6
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)
DCOM   
Dirk Hohmann   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7885 approved meteorites from (Northwest Africa) (plus 1958 unapproved names)

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