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Northwest Africa 6722 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 6722 This is an OFFICIAL meteorite name. Abbreviation: NWA 6722 Observed fall: No Year found: 2011 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 95 approved meteorites classified as L3.5. [show all] Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3) | ||||||||||||||||||||||||||||||
Comments: | Approved 6 Sep 2013 | ||||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 102:
Northwest Africa 6722 (NWA 6722) Northwest Africa Purchased: 2011 Feb Classification: Ordinary chondrite (L3.5) Petrography: (A. Irving and S. Kuehner, UWS) Well-formed, medium-sized (some to 0.7 mm) chondrules in a matrix containing stained metal. Minerals are olivine, orthopyroxene, clinopyroxene, sodic plagioclase, chromite, altered kamacite, Ni-bearing troilite and pentlandite. Geochemistry: Olivine (Fa13.7-36.8; Cr2O3 for ferroan olivine grains = 0.05 to 0.10 wt.%, mean 0.07, s.d. 0.02, N = 7), orthopyroxene (Fs2.3-6.9Wo0.4-0.7), clinopyroxene (Fs3.1-6.5Wo35.1-27.1). Classification: Ordinary chondrite (L3.5). Subtype estimated to be 3.5 based on Cr2O3 range in ferroan olivine. Estimation of subtype based on histograms (Fig. 4) in Grossman and Brearley (2005). | ||||||||||||||||||||||||||||||
Bibliography: |
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Data from: MB102 Table 0 Line 0: |
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Institutions and collections |
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012) UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
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Photos: |
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Geography: |
Statistics: This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names) |