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Northwest Africa 5891
Basic information Name: Northwest Africa 5891
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 5891
Observed fall: No
Year found: 2005
Country: (Northwest Africa)
Mass:help 16.9 g
Classification
  history:
Meteoritical Bulletin:  MB 109  (2021)  Pallasite
Recommended:  Pallasite    [explanation]

This is 1 of 81 approved meteorites classified as Pallasite.   [show all]
Search for other: Metal-rich meteorites, Pallasites
Comments: Approved 10 Mar 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 5891 (NWA 5891)

(Northwest Africa)

Purchased: 2005

Classification: Pallasite

History: The meteorite was purchased from a local meteorite dealer in Midelt, Morocco.

Physical characteristics: Brownish fragment without fusion crust.

Petrography: The meteorite is composed of up to 1 cm sized subrounded and partly fragmented olivine grains surrounded by a matrix of brownish iron oxides which are also present along the olivine grain boundaries and cracks. Contains some Cr-bearing troilite; no pristine FeNi-metal was detected.

Geochemistry: olivine: Fa7.5±0.1 (Fa4.4-4.8, FeO/MnO=37±3, n=11)

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Midelt, Morocco
Date:P 2005
Mass (g):16.9
Pieces:1
Class:Pallasite
Shock stage:low
Weathering grade:moderate
Fayalite (mol%):7.5
Classifier:A. Greshake, MNB
Type spec mass (g):3.4
Type spec location:MNB
Main mass:Fabien Kuntz
Comments:Submitted by Ansgar Greshake
Institutions
   and collections		 MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Kuntz: Fabien Kuntz, France; Website (private address)
Catalogs:
References: Published in Gattacceca J., McCubbin F. M., Grossman J., Bouvier A., Bullock E., Chennaoui Aoudjehane H., Debaille V., D’Orazio M., Komatsu M., Miao B. and Schrader D. L. (2021) The Meteoritical Bulletin, No. 109. Meteoritics & Planetary Science 56, 1626–1630.
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9921 approved meteorites from (Northwest Africa) (plus 1838 unapproved names)

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