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Four images of a representative particle from Nd-BPP-7 from which X-ray absorption spectra were collected: (from left to right) normal contrast image obtained with a photon energy of 960 eV; elemental map of carbon obtained by subtraction using photon energies of 280 and 300 eV with the regions containing C shown as white using a standard grayscale; elemental maps of oxygen and neodymium obtained by the same method using photon energies of 525 and 540 eV (O) and 960 and 980 eV (Nd).
