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| Northwest Africa 12805 | |||||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 12805 This is an OFFICIAL meteorite name. Abbreviation: NWA 12805 Observed fall: No Year found: 2019 Country: (Northwest Africa) Mass:  671 g | ||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 623 approved meteorites classified as Ureilite. [show all] Search for other: Achondrites, Ureilites | ||||||||||||||||||||||||||||||
| Comments: | Approved 18 Aug 2019 | ||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 108:
Northwest Africa 12805 (NWA 12805) (Northwest Africa) Purchased: 2019 Classification: Ureilite History: The meteorite was purchased from a local meteorite dealer in Morocco. Physical characteristics: Brownish fragment without fusion crust. Petrography: The meteorite shows a cumulate texture of olivine and pigeonite grains with highly variable grain sizes. Coarse-grained regions have grain sizes of up to 2 mm, more fine-grained regions of about 0.5 mm. The meteorite contains flaky graphite; olivine displays characteristic reduced rims. Geochemistry: reduced rims in olivine: Fa1.2-4.7; olivine contains 0.76±0.03 wt% Cr2O3 and 0.39±0.01 wt% CaO | ||||||||||||||||||||||||||||||
| Data from: MB108 Table 0 Line 0: |
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| Institutions and collections |
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011) |
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| Catalogs: |
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| References: | Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
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| Geography: |
Statistics: This is 1 of 9013 approved meteorites from (Northwest Africa) (plus 1869 unapproved names) | ||||||||||||||||||||||||||||||