NWA 6848 (4,450 g)

This is the only approved meteorite classified as R5-6
 
Northwest Africa 6848 (NWA 6848)
(Northwest Africa)
Purchased: 2011
Classification: R5-6
History: The meteorite was purchased in 2011 from a local meteorite dealer in Erfoud, Morocco.
Physical characteristics: Many small fragments partly to completely covered with fusion crust
Petrography: The meteorite is a breccia with up to 6 mm sized light coloured lithic fragments of petrological type 5 set into a fine-grained clastic groundmass of type 6. Ferroan olivine is the dominant mineral phase in clasts and matrix. Minor phases include albitic feldspar, low-Ca pyroxene, chromite, pentlandite and pyrrhotite. FeNi metal is virtually absent.
 
Place of purchase:
Erfoud, Morocco
Date:
P 2011
Mass (g):
390
Pieces:
many
Class:
R5-6
Shock stage:
S4
Weathering grade:
W1
Fayalite (mol%):
38.1±0.2 (n=14)
Ferrosilite (mol%):
28.9±0.4 (n=12)
Wollastonite (mol%):
1.6±0.2 (n=12)
Classifier:
A. Greshake, MNB
Type spec mass (g):
21.8
Type spec location:
MNB
Main mass:
Hanno Strufe
Comments:
Submitted by Ansgar Greshake