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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:
Recommended:  H5    [explanation]

This is 1 of 10565 approved meteorites (plus 18 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 Meteoritical Bulletin, no. 110, in preparation (2021)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7937 approved meteorites from (Northwest Africa) (plus 1960 unapproved names)

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