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Northwest Africa 2517
Basic information Name: Northwest Africa 2517
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 2517
Observed fall: No
Year found: 2004
Country: (Northwest Africa)
Mass:help 17.6 g
Meteoritical Bulletin:  MB 89  (2005)  Ureilite
MetBase:  v. 7.1  (2006)  Ureilite
Recommended:  Ureilite    [explanation]

This is 1 of 605 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Writeup from MB online:

Northwest Africa 2517

Boudnib area, Morocco

Found 2004

Achondrite (ureilite)

One completely crusted stone weighing 17.6 g was purchased in Erfoud in 2004 September. Classification and mineralogy (M. Bourot-Denise, MNHNP): olivine crystals are mm-sized, with edges blackened by ribbons of sulfide associated with metal. Alteration is evident at grain boundaries. Metal and sulfide are intergrown. Pyroxene is in large, fissured crystals with cleavage planes blackened by fine sulfide blebs. Silicate crystals are abutting to each other practically without any interstitial material. Olivines are zoned, with a composition varying from Fa~1.4 at the edge up to Fa~22 at the center; mean at the center Fa22.6 ± 0.2, 0.5 wt% Cr2O3, 0.3 wt% CaO; pyroxene (pigeonite) Fs19.0 ± 0.6 Wo8.9 ± 1.6, 1.2 wt% Cr2O3. Magnetic susceptibility 4.35 (J. Gattacceca, CEREGE, Aix en Provence).  Estimated shock stage S4, weathering grade W2. Specimens: type specimen 3.3 g and one polished mount, MNHNP; main mass with PThomas.

Data from:
  Table 7
  Line 305:
Place of purchase:Erfoud
Date:1 Sep 2004
Mass (g):17.64
Shock stage:S4
Weathering grade:W2
Fayalite (mol%):22.6±0.2
Ferrosilite (mol%):19.1
Classifier:M. Bourot-Denise, MNHNP
Type spec mass (g):3.3
Main mass:Thomas
   and collections
CEREGE: CEREGE BP 80 Avenue Philibert, Technopole de l'Arbois 13545 Aix-en-Provence Cedex 4 France, France (institutional address; updated 29 Oct 2018)
MNHNP: Museum National d'Histoire Naturelle, IMPMC-CP52, 57 rue Cuvier, 75005 Paris, France, France; Website (institutional address)
PThomas: Philippe Thomas, Meteoritica, La Chave, 07690 St André en Vivarais, France (private address)
References: Published in Meteoritical Bulletin, no. 89, MAPS 40, A201-A263 (2005)
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     This is 1 of 8495 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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