Fig 11: Meteoritic spallation fragment imaged below (7101 eV) and above (7140 eV)
Images below and above the Fe K-edge at 7101 and 7140 eV, respectively, of iron-rich crystallites in an olivine matrix. The dark areas in the 7101 eV image are features containing elements with high absorption at 7 keV. These features could be easily identified with the x-ray fluorescence detector that will be added to the TXM later this year. Images were also collected in 1 eV increments across the absorption edge and are presently being analyzed using a principal components technique to construct XANES that will highlight the different chemical species of iron that might be present
Images below and above the Fe K-edge at 7101 and 7140 eV, respectively, of iron-rich crystallites in an olivine matrix. The dark areas in the 7101 eV image are features containing elements with high absorption at 7 keV. These features could be easily identified with the x-ray fluorescence detector that will be added to the TXM later this year. Images were also collected in 1 eV increments across the absorption edge and are presently being analyzed using a principal components technique to construct XANES that will highlight the different chemical species of iron that might be present