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Northwest Africa 6825
Basic information Name: Northwest Africa 6825
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 6825
Observed fall: No
Year found: 2010
Country: (Northwest Africa)
Mass:help 820 g
Classification
  history:
Recommended:  R5    [explanation]

This is 1 of 35 approved meteorites classified as R5.   [show all]
Search for other: Rumuruti chondrites, Rumuruti chondrites (type 4-7)
Comments: Approved 20 Oct 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 6825 (NWA 6825)

(Northwest Africa)

Purchased: 2010

Classification: Rumuruti chondrite (R5)

History: The meteorite was purchased from a local meteorite dealer in Erfoud, Morocco.

Physical characteristics: Fourteen dark greyish fragments partly covered with fusion crust.

Petrography: The meteorite is a R-type breccia composed of up to 1 cm sized angular to subrounded clasts set into a more fine-grained greyish clastic matrix. Chondrules are well preserved and have an average apparent mean diameter of about 400 μm. Fe-rich olivine is the dominant mineral in clasts and matrix. More minor phases include low-Ca pyroxene, augite, pentlandite, and sodic plagioclase; no metal has been detected. The meteorite contains shock melt veins.

Geochemistry: olivine: Fa37.7±0.2 (n=18, FeO/MnO=82±5); low-Ca pyroxene: Fs29.6±0.3Wo1.7±0.2, n=4; Ca-pyroxene: Fs11.2±0.4Wo45.0±0.6, n=10

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Erfoud, Morocco
Date:P 2010
Mass (g):820
Pieces:14
Class:R5
Shock stage:S4
Weathering grade:W1
Fayalite (mol%):37.7
Ferrosilite (mol%):29.6; 11.2
Wollastonite (mol%):1.7; 45.0
Classifier:A. Greshake, MNB
Type spec mass (g):20.6
Type spec location:MNB
Main mass:Stefan Ralew
Comments:Submitted by Ansgar Greshake
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstrasse 43, D-10115 Berlin, Germany (institutional address)
Ralew: Stefan Ralew, Kunibertstraße 29, 12524 Berlin, Germany; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 108, in preparation (2019)
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)
DCOM   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7005 approved meteorites from (Northwest Africa) (plus 2002 unapproved names)

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