Iron meteorite from Gebel Kamil, Egypt weighing 29.88 grams More
Meteorite structural classification: meteoric iron
Impact site: East Uweinat desert, Egypt
The weight of the meteorite is 29.88 grams and the dimensions are 36x33x12 mm.
The meteorite is housed in a plastic box with a white backing and description, complete with information about the meteorite's origin.
!!! You are buying exactly the piece that is shown in the photo !!!
History : In February 2009 and February 2010, an Italian-Egyptian geophysical team found in and around the 45 m diameter Kamil impact crater a total of about 1600 kg of iron meteorite fragments (thousands of pieces) ranging in weight from < 1 to 35,000 g and one individual weighing 83 kg, which was completely covered with well-developed regmaglypts. Of the total mass observed in the field, approximately 800 kg (including the individual with regmaglypts) was recovered. Crater Kamil identified V. De Michele, former curator of the Natural History Museum in Milan, Italy. The geophysical survey was carried out in the framework of the "Italian-Egyptian Year of Science and Technology 2009".
Physical characteristics. The surface, which originally sat in desert soil, shows some oxihydroxides caused by terrestrial weathering.
Petrography: (M. D'Orazio, DST-PI; Luigi Folco, MNA-SI) Etched sections show an ataxitic structure interrupted on the centimeter scale by crystals of schreibersite, troilite, and daubreelite encased in mantle kamacite. Kamacite spindles (20 ± 5 um wide) grown on small schreibersite crystals. The spindles form small aligned clusters and are lined with taenite. The matrix is a duplex plexite composed of approximately equal proportions of kamacite and taenite lamellae (1-5 um thick) arranged in a micro-Widmanstätten pattern. Shear dislocations offsetting the plessitic matrix and accessory phase crystals by several millimetres are evident in many sections, particularly near the outer surface.
Geochemistry: metal compositions (ICP-MS; D'Orazio and Folco, 2003) are Co = 0.75, Ni = 19.8 (both in weight percent), Cu = 464, Ga = 49, Ge = 121, As = 15. 6, Mo = 9.1, Ru = 2.11, Rh = 0.75, Pd = 4.8, Sn = 2.49, Sb = 0.26, W = 0.66, Re = 0.04, Ir = 0.39, Pt = 3.5, Au = 1.57 (all in ppm).
Classification: (M. D'Orazio, DST-PI; Luigi Folco, MNA-SI) Iron meteorite (ungrouped), Ni-rich ataxite, extensive shear deformation and low weathering.