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MORPHOLOGIES OF IRON CRYSTALS FROM THE HAVERÖ METEORITE
Author(s) -
Jedwab Jacques
Publication year - 1972
Publication title -
meteoritics
Language(s) - English
Resource type - Journals
eISSN - 1945-5100
pISSN - 0026-1114
DOI - 10.1111/j.1945-5100.1972.tb00134.x
Subject(s) - meteorite , electron microprobe , scanning electron microscope , materials science , microprobe , mineralogy , metal , electron microscope , crystallography , metallurgy , geology , chemistry , composite material , astrobiology , optics , physics
Studies of unpolished chips of the Haverö meteorite using the scanning electron microscope (SEM) and the electron microprobe (EMP), show two types of metallic iron particles: A, discrete convex globules of 5 to 50 microns made up of lamellae and interlocked grains, evenly interspersed among the matrix; B, flattened contorted crystals, less than one micron, lining the iron globules and cavities in the silicates or forming rounded spiny bodies. This second type of iron is interpreted, according to the current theory, as resulting from the in situ reduction of iron‐magnesium silicates