Figure 6
(a) XRF maps of Al and Si collected at 1900 eV in the area of POI4 which appears as a silicon-only compound. The map size is 210 µm × 210 µm, collected in steps of 3 µm × 3 µm and 1 s dwell time. (b) The Raman spectra (left) identify POI4 as pure quartz only. Si K-edge XANES (right) collected in POI4 in 0° and 90° polarization are identical to those already published (Taillefumier et al., 2002). |