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Northwest Africa 5217
Basic information Name: Northwest Africa 5217
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 5217
Observed fall: No
Year found: 2007
Country: Morocco
Mass:help 39.1 g
Classification
  history:
Meteoritical Bulletin:  MB 94  (2008)  Aubrite
Recommended:  Aubrite    [explanation]

This is 1 of 63 approved meteorites classified as Aubrite.   [show all]
Search for other: Achondrites, Aubrites, Enstatite achondrites, and Enstatite-rich meteorites
Comments: Approved 15 May 2008
Writeuphelp
Writeup from MB 94:

Northwest Africa 5217

Morocco

Find: 2007

Achondrite (aubrite)

History and physical characteristics: A 39.1 g complete and fully crusted stone was found in Morocco in 2007 and given to the present owner at the Tucson Gem and Mineral Show in January 2008.

Petrography: (T. Bunch and J. Wittke, NAU) The fine to medium-grained (<1.2 mm) unbrecciated, cumulate-textured stone is composed essentially of enstatite with interstitial Si-bearing kamacite; sulfides (troilite, daubreelite, brezinaite, oldhamite, alabandite, niningerite, caswellsilverite), graphite, plagioclase, a silica phase, and schöllhornite, a weathering product of caswellsilverite. Weathering grade is low.

Mineral compositions: (EMPA analyses, all in wt%) Enstatite is En99.4Fs0.2Wo0.4; metal is Si-rich kamacite (Ni = 5.8–6.6; Si = 3.9–4.5); Oldhamite: S = 38.7, Ca = 59.2, Cr = 1.4, Mn = 1.2; brezinaite: S = 46.0, Cr =54.1; caswellsilverite: S = 45.3, Cr = 38.4, Na = 14.7, Fe = 0.7; troilite: Cr = 2.68, Ti = 3.38; plagioclase: An17Or3.7; and schöllhornite: S = 46.0, Cr = 37.3, Fe = 1.1 (remainder is oxygen and hydrogen).

Classification: Achondrite (aubrite).

Type specimen: A total of 8.5 g and one thin section are on deposit at NAU. The holder of the main mass is anonymous.

Data from:
  MB94
  Table 2
  Line 97:
State/Prov/County:Morocco
Date:2007
Mass (g):39.1
Pieces:1
Class:Aubrite
Ferrosilite (mol%):0.2
Wollastonite (mol%):0.4
Classifier:T. Bunch and J. Wittke, NAU
Type spec mass (g):8.5
Type spec location:NAU
Institutions
   and collections
NAU: Geology, Bldg 12 Knoles Dr Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 94, MAPS 43, 1551-1588 (2008)
Find references in NASA ADS:
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1417 approved meteorites from Morocco (plus 15 unapproved names) (plus 1 impact crater)

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