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Northwest Africa 8441
Basic information Name: Northwest Africa 8441
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8441
Observed fall: No
Year found: 2012
Country: (Northwest Africa)
Mass:help 130 g
Meteoritical Bulletin:  MB 103  (2014)  Iron, IAB-sLM-an
Recommended:  Iron, IAB-sLM-an    [explanation]

This is the only approved meteorite classified as Iron, IAB-sLM-an.
Search for other: IAB complex irons, Iron meteorites, and Metal-rich meteorites
Comments: Approved 6 Jun 2014
Writeup from MB 103:

Northwest Africa 8441 (NWA 8441)

(Northwest Africa)

Purchased: June 2012

Classification: Iron, IAB-sLM-an

Petrography: The type specimen is etched on two surfaces to yield a total area of about 10 cm2. It is a finest octahedrite with kamacite bandwidth of 0.09±0.02 mm. It contains three small (0.3 to 1.3 mm diameter) FeS inclusions. Tiny amounts of schreibersite were tentatively identified at points where kamacite bands intersect. No silicates were recognized. Near the end of one surface is a wide wavy kamacite interpreted to be the boundary between two precursor gamma crystals. Weathering is minor but no heat-altered zone was recognized.

Geochemistry: Composition: Co, 5.18 mg/g; Ni, 119.5 mg/g; Ga, 37.9 μg/g; Ge, ~150 μg/g; As, 16.0 μg/g; Ir, 1.64 μg/g; and Au, 1.629 μg/g. The meteorite plots in or close to IAB-sLM fields on element-Au diagrams but differs in enough cases that the preferred classification is IAB-sLM-an.

Classification: The nearest compositional relatives are Edmonton (Kentucky) and Persimmon Creek but its Ir and W contents are higher and its Co content lower than in these IAB-sLM irons.

Data from:
  Table 0
  Line 0:
Place of purchase:Erfoud, Morocco
Date:P June 2012
Mass (g):130
Class:Iron, IAB-sLM-an
Classifier:J.T. Wasson, UCLA
Type spec mass (g):20.5
Type spec location:UCLA
Main mass:M. Cimala
Comments:Cimala 107; submitted by J.T. Wasson, M. Cimala
   and collections
UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011)
References: Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
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     This is 1 of 8495 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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