Figure 4

XRF analyses in sample MS1.
VL: visible image of a stained slice of MS1 sample: boxes represent the corresponding sub-areas resolved under XRF analyses. 1 and 2: Ca, Fe and Zn XRF map (150 μm × 160 μm) acquired at the XFM beamline. The concentration is in ppm. Figures 2b: elemental maps of S, P, Fe and Ca in a sub-area (30 μm × 40 μm) of Panel 2 investigated at 7.2 keV (ID21 beamline). Area 3: elemental maps of S, P, Fe and Ca (160 μm × 60 μm) investigated at 7.2 keV (ID21 beamline).