Figure 6
XRF elemental maps obtained at 4.12 keV.
Upper row (a), (25 μm × 30 μm) elemental maps of S, P, Fe and Ca on a sub-region of the sample MS2 indicated with the red arrow in Figure 2 (region 1); row (b) (20 μm × 30 μm): elemental maps of S, P, Fe and Ca on a sub-region of the sample MS2 indicated with the red arrow in Figure 3 (region 2). Lower row (c) (30 μm × 15 μm): S, P, Ca and Fe elemental maps of a sub-region of the V1 control sample. The table reports the intensity (intended as peak counts) for Ca, P, S and Mg (over a 1 μm × 1 μm area); and the corresponding ppm Ca concentrations (over a 10 μm × 10 μm) centered in the points indicated in the images (calculated at 12.74). In Ca maps of panels a and b dashed gray lines delineate high counts regions in calcifications.
