Meteorite: Ungrouped Achondrite NWA 8409 Paired 0.032 grams #613

Description

Meteorite: Ungrouped Achondrite NWA 8409 Paired 0.032 grams #613
On Offer:
0.032
grams fragment of NWA 8409
Type:
Ungrouped Ac
hondrite
SEE OFFICIAL METEORITICAL SOCIETY ENTRY BELOW:
Northwest Africa 8409
Basic information
Name:
Northwest Africa 8409
This is an OFFICIAL meteorite name.
Abbreviation:
NWA 8409
Observed fall:
No
Year found:
2013
Country:
(Northwest Africa)
Mass:
434 g
Classification
history:
Meteoritical Bulletin:  MB 105
(2016)
Achondrite-ung
Recommended:
Achondrite-ung
This is 1 of 121 approved meteorites classified as Achondrite-ung.
Search for other: Chondrites, Ungrouped achondrites
Comments:
Approved 26 May 2016
Writeup
Writeup from MB 105:
Northwest Africa 8409
(NWA 8409)
(Northwest Africa)
Purchased: 2013 Jun
Classification: Ungrouped achondrite
History
: Purchased by Marc Jost in June 2013 from several Moroccan dealers at the Ensisheim Show.
Physical characteristics
: A group of essentially identical dark green, uncrusted stones ranging in size from 99 g to <1 g. Distinctive green clinopyroxene and gray, frosty plagioclase are evident.
Petrography
: (A. Irving and S. Kuehner,
UWS
) Cumulate igneous texture. Composed mainly of calcic plagioclase, diopside and forsterite with accessory Cr-bearing troilite and kamacite. Lobate forsterite grains are commonly associated with elongate pores.
Geochemistry
: Olivine (Fa
4.5-4.6
, FeO/MnO = 36-41, N = 3), clinopyroxene (Fs
1.8-2.2
Wo
44.3-43.8
, FeO/MnO = 12-15, N = 3).
Classification
: Achondrite (ungrouped). Paired with NWA 7325, NWA 8014 and other stones from the Bir Abbas site.
Specimens
: 20.4 g including one polished piece at
UWB
; remainder held by
SJS
.
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e combine shipping
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