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(a) Scanning of a petrographic section of the Estacado chondritic meteorite obtained by SMS imaging; (b) a contour plot of the same section; (c) an optical microscope image of the same area; (d–f) time spectra for three selected spots, which show (d) an iron–sulfur compound grain, (e) Fe–Ni alloy and (f) troilite FeS.
