Acapulcoite | NWA 12892 | Primitive Achondrite
2.00 g. | Full slice | NWA 12892| Acapulcoite | Primitive Achondrite
€160,00 EUR
- Quantity
- 1
- Condition
- Very Good
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Free to Bulgaria
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- penneff (26 )
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- 08.10.2019
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1700, Sofia, Bulgaria
Description
Full slice of NWA 12892, Acapulcoite meteorite
Meteorite Name: Northwest Africa 12892
Abbreviation: NWA 12892
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Main Mass: 24.88 g.
Specimen description:
Type, group, subgroup: Stone, Primitive Achondrite, Acapulcoite
Specimen Weight: 2.00 grams
Approximate Measurements: 24 mm x 24 mm x 1.2 mm
Full slice.
Elegant slices worthy of any collection.
Arrives with a certificate of authenticity. IMCA #6460
Note: The meteorite is sold without the scale cube.
Shock stage: | low |
Weathering grade: | low |
Fayalite (mol%): | 8.9±0.3 |
Ferrosilite (mol%): | 9.8±0.3, 4.1±0.2 |
Wollastonite (mol%): | 2.5±0.4, 42.5±2.6 |
Physical characteristics: Single dark-brown stone with minor fusion crust.
Petrography: (D. Sheikh, FSU) Sample is highly recrystallized and contains abundant 120° triple junctions. Silicate major phases include angular to sub-rounded grains (Av. 180 μm) of olivine, low-ca pyroxene, high-ca pyroxene, and plagioclase. Fe-Ni metal grains (mostly kamacite, Av. 500 μm) occupy ~10% volume of the sample. Other phases include troilite, chromite, fluorapatite, and merrillite.
Geochemistry: (D. Sheikh, FSU) Olivine (Fa8.9±0.3, range Fa8.3-9.7, Fe/Mn=17±4, n=32), low-Ca Pyroxene (Fs9.8±0.3Wo2.5±0.4, range Fs9.3-10.4Wo1.7-3.1, Fe/Mn=11±2, n=26), high-Ca Pyroxene (Fs4.1±0.2Wo42.5±2.6, range Fs3.8-4.3Wo38.7-44.3, Cr2O3 1.4 wt%, Fe/Mn=6±1, n=4), plagioclase (An19.5±0.8Or2.5±0.4, range An18.7-20.4Or2.0-3.0, n=5), Chromite (Cr/(Cr Al)=86.9, n=2), Kamacite (Ni wt%=6.6, n=11).
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Postage & Shipping
- Item Location
- 1700, Sofia, Bulgaria
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- Worldwide
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