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Northwest Africa 12812
Basic information Name: Northwest Africa 12812
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12812
Observed fall: No
Year found: 2001
Country: (Northwest Africa)
Mass:help 600 g
Classification
  history:
Meteoritical Bulletin:  MB 108  (2020)  Diogenite
Recommended:  Diogenite    [explanation]

This is 1 of 518 approved meteorites classified as Diogenite.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 18 Aug 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12812 (NWA 12812)

(Northwest Africa)

Purchased: 2001

Classification: HED achondrite (Diogenite)

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

Physical characteristics: Many greyish fragments without fusion crust.

Petrography: The meteorite displays a grayish interior and is predominantly composed of blocky up to 7 mm sized orthoproxene grains. Minor phases include calcic plagioclase, silica, chromite, FeS, and metallic iron. It appears unbrecciated in the section studied.

Geochemistry: low-Ca pyroxene: Fs27.7±0.6Wo2.9±0.6 (Fs26.4-28.3Wo2.5-4.7, n=12, FeO/MnO=26-32); calcic plagioclase: An93.0±0.7 (An92.2-94.5, n=12)

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Erfoud, Morocco
Date:P 2001
Mass (g):600
Pieces:many
Class:Diogenite
Shock stage:S1
Weathering grade:low
Ferrosilite (mol%):27.7
Wollastonite (mol%):2.9
Classifier:A. Greshake, MNB
Type spec mass (g):21.1
Type spec location:MNB
Main mass:A. Pani, Vienna
Comments:Submitted by Ansgar Greshake
Institutions
   and collections		 MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Pani: A. Pani, Meteorites-Minerals-Fossils, Lassallestr. 4/20, A-1020 Vienna, Austria; Website (private address)
Vienna: University of Vienna, Dr-Karl-Lueger-Ring 1, A-1010 Wien, Austria (institutional address)
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 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

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