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Northwest Africa 13773
Basic information Name: Northwest Africa 13773
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13773
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 176 g
Classification
  history:
Recommended:  Diogenite    [explanation]

This is 1 of 455 approved meteorites classified as Diogenite.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 28 Mar 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 13773 (NWA 13773)

(Northwest Africa)

Purchased: 2021

Classification: HED achondrite (Diogenite)

History: The meteorite was purchased from a group of meteorites hunters in Nouadhibou, Mauritania, in early 2021.

Physical characteristics: Ten light-grayish fragments some of which partly covered with shiny fusion crust. Exposes up to 1 cm sized orthopyroxene crystals at broken surfaces.

Petrography: The meteorite is a monomict breccia predominantly composed of blocky typically 100 to 700 µm sized orthoproxene grains and related more fine-grained cataclastic regions. Rarely unusual large pyroxene crystals up to 1 cm in size occurr. Minor phases include chromite, FeS, and some metallic iron. No plagioclase has been found in the section studied.

Geochemistry: low-Ca pyroxene: Fs21.3±0.6Wo1.3±0.1 (Fs20.4-22.2Wo1.2-1.5, n=11, FeO/MnO=25-29)

Classification: Diogenite

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Nouadhibou, Mauritania
Date:P 2021
Mass (g):176
Pieces:10
Class:Diogenite
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):21.3
Wollastonite (mol%):1.3
Classifier:A. Greshake, MNB
Type spec mass (g):22.3
Type spec location:MNB
Main mass:Salamu Ali
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. 110, in preparation (2021)
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7655 approved meteorites from (Northwest Africa) (plus 1972 unapproved names)

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