Meteoritical Bulletin: Entry for Northwest Africa 5597

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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: 171.5 g

Classification
history:

Recommended:

Diogenite [explanation]

This is 1 of 444 approved meteorites classified as Diogenite. [show all]
Search for other: Achondrites, Diogenites, and HED achondrites

Comments:

Approved 3 Jul 2020

Writeup

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: Fs_25.4±0.2Wo_2.7±0.5(Fs_24.8-25.6Wo_1.8-3.2, n=11, FeO/MnO=24-26); olivine: Fa_30.0±0.2(Fa_29.8-30.2, n=7, FeO/MnO=41-50); calcic plagioclase: An_87.1±0.7(An_86.3-87.4, 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 Meteoritical Bulletin, no. 109, in preparation (2020)

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Photos:

Credit	Photos
Photos uploaded by members of the Encyclopedia of Meteorites. (Caution, these are of unknown reliability)
DCOM

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 7472 approved meteorites from (Northwest Africa) (plus 1988 unapproved names)

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