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Northwest Africa 12500
Basic information Name: Northwest Africa 12500
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12500
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 108.7 g
Classification
  history:
Meteoritical Bulletin:  MB 110  (2022)  H5
Recommended:  H5    [explanation]

This is 1 of 11505 approved meteorites (plus 23 unapproved names) classified as H5.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 18 Jan 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 12500 (NWA 12500)

(Northwest Africa)

Purchased: 2018

Classification: Ordinary chondrite (H5)

History: Purchased at Hamburg Mineral Show Dec. 2018.

Physical characteristics: 108.7 g dark-brown stone with metallic specks on the surface

Petrography: (R. Bartoschewitz, Bart) fractured matrix with melt dykes and recrystallized melt pools, and poorly recognizable chondrule relicts. Metal and sulfide penetration into cracks blackened the meteorite.

Geochemistry: (R. Bartoschewitz, Bart, P. Appel and B. Mader, Kiel) Olivine Fa18.2±0.4 (range Fa17.3-19.0; n=16); pyroxene Fs15.8±0.3Wo1.7±0.2; feldspar An14-18Or2-5 (n=2); chromit CRAL=85, FFM=67 (n=1). Kamacite Ni=6.4-8.7 wt%, Co=0.6 wt% (n=5). Magnetic susceptibility (R. Bartoschewitz, Bart) log χ (× 10-9 m3/kg) = 5.50

Classification: Ordinary chondrite (H5, S5, W0)

Specimens: 20.1 g at Kiel, Bart holds the main mass.

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Hamburg
Date:P 2018
Mass (g):108.7
Pieces:1
Class:H5
Shock stage:S5
Weathering grade:W0
Fayalite (mol%):18.2±0.4 (range 17.3-19.0; n=16)
Ferrosilite (mol%):15.8±0.3 (n=7)
Wollastonite (mol%):1.7±0.2
Magnetic suscept.:5.50
Classifier:R. Bartoschewitz
Type spec mass (g):20.1
Type spec location:Kiel
Main mass:Bart
Finder:anonymous
Comments:NWA-RB14; submitted by R. Bartoschewitz
Institutions
   and collections
Kiel: Geologisches und Mineralogisches Museum, Institut für Geowissenschaften, Christian-Albrechts-Universität Kiel, Ludewig-Mayn-Str. 10, D-24118 Kiel, Germany, Germany (institutional address; updated 13 Sep 2013)
Bart: Bartoschewitz Meteorite Laboratory, Weiland 37, D-38518 Gifhorn, Germany; Website (private address; updated 30 Nov 2019)
Catalogs:
References: Published in Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9627 approved meteorites from (Northwest Africa) (plus 1865 unapproved names)
Also see:
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Revision
  history:
  This lists important revisions made to data for this record.

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