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Northwest Africa 12888
Basic information Name: Northwest Africa 12888
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12888
Observed fall: No
Year found: 2005
Country: (Northwest Africa)
Mass:help 1197 g
Meteoritical Bulletin:  MB 108  (2020)  L5
Recommended:  L5    [explanation]

This is 1 of 7309 approved meteorites (plus 4 unapproved names) classified as L5.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 7 Sep 2019
Writeup from MB 108:

Northwest Africa 12888 (NWA 12888)

(Northwest Africa)

Purchased: 2005

Classification: Ordinary chondrite (L5)

History: Purchased by an anonymous collector from a dealer at the Munich Show in 2005, subsequently acquired by PSF, then sold in 2019 to the Harkness Collection.

Petrography: (A. Irving, UWS and J. Boesenberg, BrownU) Monomict breccia composed of clasts and related mineral debris. The clasts contain sparse chondrules set in a recrystallized matrix containing altered metal.

Geochemistry: Olivine (Fa25.1±0.5 (range Fa24.5-25.4, N = 3), low-Ca pyroxene (Fs22.2±2.1Wo2.1±0.3 (range Fs21.0-25.3Wo1.8-2.6, N = 4).

Classification: Ordinary chondrite (L5 breccia).

Specimens: 24.2 g including one polished thin section at PSF; remainder in Harkness Collection.

Data from:
  Table 0
  Line 0:
Place of purchase:Munich
Date:P 2005
Mass (g):1197
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):25.1±0.5
Ferrosilite (mol%):22.2±2.1
Wollastonite (mol%):2.1±0.3
Classifier:A. Irving, UWS, and J. Boesenberg, BrownU
Type spec mass (g):24.2
Type spec location:PSF
Main mass:Harkness Collection
Comments:Work name HC2; submitted by A. Irving
   and collections
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
BrownU: Brown University Providence, RI 02912, United States (institutional address; updated 7 Sep 2019)
References: Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
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     This is 1 of 7937 approved meteorites from (Northwest Africa) (plus 1960 unapproved names)

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