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Northwest Africa 5289
Basic information Name: Northwest Africa 5289
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 5289
Observed fall: No
Year found: 2007
Country: (Northwest Africa)
Mass:help 296 g
Classification
  history:
Meteoritical Bulletin:  MB 94  (2008)  Iron IVA
Recommended:  Iron, IVA    [explanation]

This is 1 of 81 approved meteorites (plus 1 unapproved name) classified as Iron, IVA.   [show all]
Search for other: Iron meteorites, IVA irons, and Metal-rich meteorites
Comments: Approved 16 Dec 2008
Writeuphelp
Writeup from MB 94:

Northwest Africa 5289

Northwest Africa

Find: 2007

Iron (IVA)

History: A single iron mass was purchased from a Moroccan dealer in August 2007 by M. Graul (Bernau, Germany).

Physical characteristics: The 296 g mass, measuring approximately 81 × 54 × 30 mm, has a flattened shape. The portion of the surface originally sitting into the soil is partially covered with caliche deposit, whereas the remaining portion appears to be polished by wind-driven sand. No fusion crust is preserved.

Petrography: (M. D’Orazio, DST-PI) Widmanstätten pattern with kamacite lamellae (bandwidth = 0.32 ± 0.04 mm) and plessite fields in approximately 1:1 volumetric ratio. The kamacite lamellae show abundant Neumann bands and occasionally are displaced along shear planes. Accessory phases: schreibersite, troilite, chromite (tiny euhedral crystals included in troilite) and anhydrous Fe-phosphate (up to 1.3 mm in maximum length and surrounded by swathing kamacite).

Geochemistry: (M. D’Orazio, DST-PI) Composition of the metal (ICP-MS) is Co = 0.404, Ni = 9.02 (both in wt%), Cu = 111, Ga = 2.0, Ge < 1, As = 12.0, W = 0.36, Re = 0.08, Ir = 0.80, Pt = 3.76, Au = 2.33 (all in ppm).

Classification: Iron meteorite (IVA), fine octahedrite.

Type specimen: A 20.3 g etched endcut sample and 11.3 g of shavings are on deposit at DST-PI. M. Graul holds the main mass.

Data from:
  MB94
  Table 2
  Line 99:
State/Prov/County:Northwest Africa
Date:2007
Mass (g):296
Pieces:1
Class:Iron IVA
Classifier:M. D’Orazio, DST-PI
Type spec mass (g):31.6
Type spec location:DST-PI
Main mass:Graul
Comments:Co = 0.404, Ni = 9.02 (both in wt%), Cu =111, Ga = 2.0, Ge < 1, As =12.0, W = 0.36, Re = 0.08, Ir = 0.80, Pt = 3.76, Au = 2.33 (all in ppm)
Institutions
   and collections
DST-PI: Dipartimento di Scienze della Terra, Università di Pisa, Via S. Maria 53, 56126 Pisa, Italy (institutional address; updated 17 Oct 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 94, MAPS 43, 1551-1588 (2008)
Find references in NASA ADS:
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Alberto Giusta   
André Knöfel Photo added 20 Oct 2022
Dirk Hohmann Photo added 20 Oct 2022
Photo added 20 Oct 2022
Mirko Graul   
Photo added 20 Oct 2022
Photo added 20 Oct 2022
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8745 approved meteorites from (Northwest Africa) (plus 1880 unapproved names)

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