Μετεωρίτης Acapulcoite (NWA 16397). Εξαιρετικά σπάνιος μετεωρίτης. - 0.32 g





1 € |
|---|
Προστασία Αγοραστή Catawiki
Η πληρωμή σας είναι ασφαλής μαζί μας μέχρι να παραλάβετε το αντικείμενό σας.Προβολή λεπτομερειών
Trustpilot 4.4 | 135164 κριτικών
Βαθμολογήθηκε με Άριστα στο Trustpilot.
Μετεωρίτης Acapulcoite (NWA 16397), εξαιρετικά σπάνιος μετεωρίτης από τη Δυτική Σαχάρα, Βόρειο Δυτική Αφρική, βάρος 0,32 g.
Περιγραφή από τον πωλητή
Northwest Africa 16397 (NWA 16397)
Purchased: 2022 Oct
Classification: Primitive achondrite (Acapulcoite)
History: Reportedly this stone was found in Western Sahara
Petrography: (K. Metzler, IfP) Recrystallized rock with abundant 120° triple junctions, consisting of olivine, low-Ca pyroxene, Ca-rich pyroxene, plagioclase, and Fe-Ni metal. Accessory phases are troilite, Cr-spinel and merrillite. Silicate grain sizes are mostly between 100 and 200 µm.
Geochemistry: Mineral compositions and geochemistry: Mean olivine composition: Fa8.3±0.2 (Fa7.9-8.5); Fe/Mn (at.): 15.5; n=10. Mean low-Ca pyroxene composition: Fs8.4±0.2 Wo1.8±0.6 (Fs8.0-8.8 Wo0.8-2.6); Fe/Mn (at.): 10.7; n=11. Mean composition of Ca-rich pyroxene: Fs3.5±0.3 Wo44.0±0.7 (Fs3.1-4.3 Wo42.0-44.6); Fe/Mn (at.): 11.2; n=11. Mean feldspar composition: An14.2±1.2 Or2.4±0.4 (An12.4-15.8 Or1.7-3.0); n=11.
Classification: Acapulcoite, based on mineralogy, mineral chemistry and mean grain size of silicates.
Shock stage: M-S1
Weathering grade: Low
Classifier: K. Metzler, IfP.
This lot has no reserve price and comes with its certificate of authenticity.
Thanks for your interest.
Northwest Africa 16397 (NWA 16397)
Purchased: 2022 Oct
Classification: Primitive achondrite (Acapulcoite)
History: Reportedly this stone was found in Western Sahara
Petrography: (K. Metzler, IfP) Recrystallized rock with abundant 120° triple junctions, consisting of olivine, low-Ca pyroxene, Ca-rich pyroxene, plagioclase, and Fe-Ni metal. Accessory phases are troilite, Cr-spinel and merrillite. Silicate grain sizes are mostly between 100 and 200 µm.
Geochemistry: Mineral compositions and geochemistry: Mean olivine composition: Fa8.3±0.2 (Fa7.9-8.5); Fe/Mn (at.): 15.5; n=10. Mean low-Ca pyroxene composition: Fs8.4±0.2 Wo1.8±0.6 (Fs8.0-8.8 Wo0.8-2.6); Fe/Mn (at.): 10.7; n=11. Mean composition of Ca-rich pyroxene: Fs3.5±0.3 Wo44.0±0.7 (Fs3.1-4.3 Wo42.0-44.6); Fe/Mn (at.): 11.2; n=11. Mean feldspar composition: An14.2±1.2 Or2.4±0.4 (An12.4-15.8 Or1.7-3.0); n=11.
Classification: Acapulcoite, based on mineralogy, mineral chemistry and mean grain size of silicates.
Shock stage: M-S1
Weathering grade: Low
Classifier: K. Metzler, IfP.
This lot has no reserve price and comes with its certificate of authenticity.
Thanks for your interest.

