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Northwest Africa 5597
Basic information Name: Northwest Africa 5597
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 5597
Observed fall: No
Year found: 2007
Country: (Northwest Africa)
Mass:help 171.5 g
Classification
  history:
Meteoritical Bulletin:  MB 109  (2021)  Diogenite
Recommended:  Diogenite    [explanation]

This is 1 of 545 approved meteorites classified as Diogenite.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 3 Jul 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 5597 (NWA 5597)

(Northwest Africa)

Purchased: 2007

Classification: HED achondrite (Diogenite)

History: The meteorite was purchased in Outat el Hadj, Morocco.

Physical characteristics: Two greyish-greenish fragments largely covered by shiny fusion crust.

Petrography: The meteorite is a monomict breccia predominantly composed of blocky up to 3 mm sized orthoproxene grains and fine-grained cataclastic regions. Minor phases include olivine, plagioclase, chromite, and FeS. No metallic iron has been detected.

Geochemistry: low-Ca pyroxene: Fs25.4±0.2Wo2.7±0.5 (Fs24.8-25.6Wo1.8-3.2, n=11, FeO/MnO=24-26); olivine: Fa30.0±0.2 (Fa29.8-30.2, n=7, FeO/MnO=41-50); calcic plagioclase: An87.1±0.7 (An86.3-87.4, n=10)

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Outat el Hadj, Morocco
Date:P 2007
Mass (g):171.5
Pieces:2
Class:Diogenite
Shock stage:moderate
Weathering grade:moderate
Fayalite (mol%):30.0
Ferrosilite (mol%):25.4
Wollastonite (mol%):2.7
Classifier:A. Greshake, MNB
Type spec mass (g):20.2
Type spec location:MNB
Main mass:Svend Buhl
Comments:Submitted by Ansgar Greshake
Institutions
   and collections		 MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Catalogs:
References: Published in Gattacceca J., McCubbin F. M., Grossman J., Bouvier A., Bullock E., Chennaoui Aoudjehane H., Debaille V., D’Orazio M., Komatsu M., Miao B. and Schrader D. L. (2021) The Meteoritical Bulletin, No. 109. Meteoritics & Planetary Science 56, 1626–1630.
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9921 approved meteorites from (Northwest Africa) (plus 1838 unapproved names)

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