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Fig. 4


Extinction cross section in normalised units to compare the different chemical species presented here: silicate (olivine, black solid line), iron sulfide (troilite, blue dashed line), and metallic Fe (red solid line). The X-ray absorption features are different for these three compounds. In particular the silicate is characterised by the large peak just after the Fe K-edge located at E ~ 7130 eV.

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