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Northwest Africa 12918
Basic information Name: Northwest Africa 12918
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12918
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 2.41 kg
Classification
  history:
Recommended:  Diogenite    [explanation]

This is 1 of 434 approved meteorites classified as Diogenite.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 20 Oct 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12918 (NWA 12918)

(Northwest Africa)

Purchased: 19 mar 2019

Classification: HED achondrite (Diogenite)

History: Purchased by Carlos Muñecas and Adrian Contreras on 19 Mar 2019 from a dealer in Guelmin, Morocco.

Physical characteristics: Partially covered by a black fusion crust.

Petrography: The specimen shows a cataclastic texture with large crystal fragments in a matrix of finer grains of the same minerals. Predominantly orthopyroxene accompanied by accessory olivine, clinopyroxene, anorthite, chromite, Ni-poor metal and troilite.

Geochemistry: Mineral compositions and geochemistry: Orthopyroxene Fs24.6-25.7Wo3.1-4.0, FeO/MnO=28-34; clinopyroxene Fs10.2-11.1Wo42.9-43.8, FeO/MnO=20-22; olivine Fa25.8-27.6, FeO/MnO=49-50; plagioclase An77.7-90.9.

Classification: Diogenite

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Guelmin, Morocco
Date:P 19 mar 2019
Mass (g):2412
Pieces:5
Class:Diogenite
Shock stage:low
Weathering grade:low
Fayalite (mol%):26.3±0.5
Classifier:J. Llorca, UPC
Type spec mass (g):20.1
Type spec location:UPC
Main mass:Carlos Muñecas
Comments:Submitted by Carlos Muñecas
Institutions
   and collections
UPC: Institut de Tècniques Energètiques, Universitat Politècnica de Catalunya Diagonal 647, ed. ETSEIB, 08028 Barcelona, Spain, Spain (institutional address; updated 3 May 2015)
Catalogs:
References: Published in Meteoritical Bulletin, no. 108, in preparation (2019)
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Photos:
CreditPhotos
Public domain photographs:
Carlos Muñecas                  
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7035 approved meteorites from (Northwest Africa) (plus 2000 unapproved names)

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