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Northwest Africa 12803
Basic information Name: Northwest Africa 12803
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12803
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 312 g
Classification
  history:
Meteoritical Bulletin:  MB 108  (2020)  H4
Recommended:  H4    [explanation]

This is 1 of 6340 approved meteorites (plus 2 unapproved names) classified as H4.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 27 Jul 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12803 (NWA 12803)

(Northwest Africa)

Purchased: 2017

Classification: Ordinary chondrite (H4)

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

Physical characteristics: Brownish fragment without fusion crust.

Petrography: The meteorite displays a chondritic texture with small, mostly flattened chondrules (mean diameter about 0.3 mm) in a more fine-grained dark matrix that contains sulfides and abundant FeNi metal. Olivine is equilibrated; low-Ca-pyroxene is unequilibrated.

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Zagora, Morocco
Date:P 2017
Mass (g):312
Pieces:1
Class:H4
Shock stage:S1
Weathering grade:W2
Fayalite (mol%):19.0±0.1 (n=11)
Ferrosilite (mol%):15.5±1.8 (13.7-17.5, n=10)
Wollastonite (mol%):0.3±0.7 (0.5-1.5, n=10)
Classifier:A. Greshake, MNB
Type spec mass (g):20.7
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. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8402 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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