BRAZIL - TO
Iron Meteorite - IIAB Hexaedrite
The section etched after the acid attack on the polished surface shows a typical hexahedrite structure with shiny areas of kamacite and several sets of Neumann lines crossing the entire surface. There is no sign of fusion crust and heat-affected zone. Troilites are present as small nodules. Phosphides occur as numerous crystals of rabdite both prisms and planar morfology.
5.42% Ni; 0.45% Co; 57.4 ppm Ga; <200ppm Ge; 30.8 ppm Ir; 0.512 ppm Au (INAA, J.T. Wasson, UCLA). Kamacite 5.34% Ni; 0.41% Co. Phosphides 27% Ni; 14.7% P (EPMA Amanda Tosi LABSONDA / IGEO / UFRJ).
Iron meteorite, IIAB Hexahedrite
J. T. Wasson, M.E. Zucolotto and A. A. Tosi
Discovered in April 2015 near the city of Arraias, in the region of Mata da Ursa, by a gold miner named Vicente in an excavation of gold tailings. He alerted his boss about the discovery, Mr. José Domingos Scarpellini, who later took the meteorite to Curitiba.
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