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Northwest Africa 11404
Basic information Name: Northwest Africa 11404
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11404
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 1096 g
Meteoritical Bulletin:  MB 106  (2018)  Iron, IC
Recommended:  Iron, IC    [explanation]

This is 1 of 11 approved meteorites classified as Iron, IC.   [show all]
Search for other: IC irons, Iron meteorites, and Metal-rich meteorites
Comments: Approved 4 Sep 2017
Writeup from MB 106:

Northwest Africa 11404 (NWA 11404)

(Northwest Africa)

Purchased: June 2016

Classification: Iron meteorite (IC)

History: Bought in Zagora in June 2016.

Petrography: (J. Gattacceca, H. Pourkhorsandi, CEREGE): The etched section shows a fine-scaled struture of interlocking ~2 μm thick curved metal spindles. This indicates decompositon of the original metal into alpha+gamma phases, and heavy plastic deformation. The Widmanstätten structure has been entirely obliterated by these processes. Abundant schreibersite as euhedral grains (2-5 μm, to 10 μm) or needles up to 200 μm long.

Geochemistry: (M. D’Orazio, DST-PI): Composition of the metal (ICP-MS; D’Orazio and Folco, 2003) is Co=0.464, Ni=6.32 (both in wt%), Cr=14.6, Cu=142, Ga=61, Ge=254, As=5.0, Mo=6.3, Ru=14.2, Rh=2.32, Pd=2.09, W=2.16, Re=0.16, Ir=2.42, Pt=16.6, Au=0.527 (all in ppm).

Classification: Iron, IC

Specimens: 25 g and a polished section at CEREGE, main mass with Labenne.

Data from:
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P June 2016
Mass (g):1096
Class:Iron, IC
Weathering grade:minimal
Classifier:J. Gattacceca, H. Pourkhorsandi, CEREGE ; M. D'Orazio, DST-PI
Type spec mass (g):25
Type spec location:CEREGE
Main mass:Labenne Luc
Finder:Labenne Luc
Comments:work name LL22; submitted by J. Gattacceca
   and collections
CEREGE: CEREGE BP 80 Avenue Philibert, Technopole de l'Arbois 13545 Aix-en-Provence Cedex 4 France, France (institutional address; updated 10 Jun 2023)
DST-PI: Dipartimento di Scienze della Terra, Università di Pisa, Via S. Maria 53, 56126 Pisa, Italy (institutional address; updated 17 Oct 2011)
Labenne: 23, rue de Esperance, 75013 Paris, France; Website (private address; updated 29 Aug 2012)
References: Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
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     This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

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