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Northwest Africa 13266
Basic information Name: Northwest Africa 13266
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13266
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 750 g
Classification
  history:
Recommended:  Enst achon    [explanation]

This is 1 of 10 approved meteorites classified as Enst achon.   [show all]
Search for other: Achondrites, Enstatite achondrites, and Enstatite-rich meteorites
Comments: Approved 9 May 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13266 (NWA 13266)

(Northwest Africa)

Purchased: 2018

Classification: Enstatite achondrite

History: The meteorite was purchased from a local meteorite dealer in Niger.

Physical characteristics: Dark brownish rock without fusion crust.

Petrography: The meteorite is an enstatite achondrite predominantly composed of 50-1000 µm sized enstatite and less abundant sodic feldspar grains. Some regions appear to be recrystallized exhibiting triple junctions. Albitic and Si-rich glass is present throughout the meteorite. Opaque phases include nodules composed of niningerite and Cr-rich troilte, Si-rich kamacite, and rare Zn-bearing daubréelite. Metal grains are often spherical. No relict chondrules have been observed.

Geochemistry: enstatite: Fs0.3±0.2Wo0.3±1.3 (Fs0.1-0.6Wo0.2-0.3, n=12); feldspar: An19.2±1.9Ab79.1±1.9Or1.7±0.2 (An81.5-92.3Ab-75.9-83.2Or1.4-2.0, n=18); kamacite: Ni=7.04±0.18, Si=2.99±0.01, Co=0.24±0.01, P=0.58±0.39 (wt%), n=3

Classification: Enstatite achondrite.

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Mali
Date:P 2018
Mass (g):750
Pieces:1
Class:Enst achon
Shock stage:S1
Weathering grade:low
Ferrosilite (mol%):0.3
Wollastonite (mol%):0.3
Classifier:A. Greshake, MNB
Type spec mass (g):21
Type spec location:MNB
Main mass:Marcin Cimala
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. 109, in preparation (2020)
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Photos:
CreditPhotos
Public domain photographs:
Ansgar Greshake         
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7269 approved meteorites from (Northwest Africa) (plus 1987 unapproved names)

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