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Northwest Africa 12828
Basic information Name: Northwest Africa 12828
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12828
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 751 g
Classification
  history:
Meteoritical Bulletin:  MB 108  (2020)  Diogenite
Recommended:  Diogenite    [explanation]

This is 1 of 522 approved meteorites classified as Diogenite.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 21 Sep 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12828 (NWA 12828)

(Northwest Africa)

Purchased: 2019

Classification: HED achondrite (Diogenite)

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

Physical characteristics: Brownish rock with some fusion crust.

Petrography: The meteorite is a coarse-grained fragmental breccia predominantly composed of up to 3 mm sized orthopyroxene crystals set into fine-grained related matrix. Minor phases include chromite and FeS. Neither feldspar, nor olivine, nor metallic Fe have been detected in the section studied. The meteorite shows some orange staining due to terrestrial weathering.

Geochemistry: low-Ca pyroxene: Fs24.5.0±0.2Wo1.8±0.1 (Fs24.1-25.0Wo1.7-1.8, FeO/MnO=27-30, n=15)

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2019
Mass (g):751
Pieces:1
Class:Diogenite
Shock stage:low
Weathering grade:strong
Ferrosilite (mol%):24.5
Wollastonite (mol%):1.8
Classifier:A. Greshake, MNB
Type spec mass (g):28.7
Type spec location:MNB
Main mass:Philippe Schmitt-Kopplin
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. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9710 approved meteorites from (Northwest Africa) (plus 1853 unapproved names)
Also see:
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Revision
  history:
  This lists important revisions made to data for this record.

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