Here is offered a 97.4g full slice of the iron meteorite NWA 11106 (polished and etched one side). Shiny kamacite crystals(with Neumann lines) enclose a cetral troilite (Fe,NiS) inclusion; schreibersite ((Fe,Ni)3P) is present as golden inclusions throug the slice.
This meteorite have been classified as an octahedrite (group IAB-MG), and is officialy referenced by the Meteoritical Society :
Petrography: Polished and etched surfaces show kamacite grains up to 4 cm across with an equilibrated (120 junction) texture and containing schreibersite up to 1.5 cm in longest dimension. Neumann lines are evident. Veins of iron oxides extend into the interior along grain boundaries. No fusion crust or heat-affected zone was observed.
Geochemistry: ICP-MS data, using sample of North Chile (Filomena) as standard (C. Herd and G. Chen UAb): Ni = 6.8, Co = 0.49 (both wt%25); Ir <0.015, Ga = 67, Ge = 219, W = 0.6, Re <0.008, Os <0.04, Cu = 155, Ru = 3.0, Pd = 2.6, Pt = 3.1 (all µg/g).
Classification: (C. Herd, UAb): IAB-MG, although concentrations of Re, Ir, W and Pt seem to be anomalously low.
The slice is sent with a certificat, in a display riker box
Iron meteorites are meteorites that consist overwhelmingly of an iron–nickel alloy known as meteoric iron that usually consists of two mineral phases: kamacite and taenite. Iron meteorites originate from planetary cores of planetesimals that have been shattered by impacts. Iron meteorites have been linked to M-type asteroids because both have similar spectral characteristics in the visible and near-infrared.
- Mineral Form/ Type Meteorite
- NWA 11106 - Iron Meteorite (Octahedrite ; IAB-MG) with anomalous Re, Ir, W and Pt values - Full
- 97.4 g
- Origin (Region/ City)
- Sahara desert
- Origin (Country)