Chemical state analysis of fluorine in various compounds using X-ray fluorescence spectra

F Kα X-ray fluorescence (XRF) spectra of various fluorides were measured and to investigate the chemical state of fluorine in xHoF3–20BaF2–10AlF3–(70 − x)GeO2 (mol%, x = 10–50) glass. The main peak (Kα1,2) position and the relative intensity of the satellite peak attributable to Kα3,4 were discussed relating to the M–F bond covalency. Results showed that the fluorine in xHoF3–20BaF2–10AlF3–(70 − x)GeO2 (mol%, x = 10–50) glass had a completely different chemical state from that of starting materials. Quantitative analyses of the glasses were also undertaken using XRF measurements for each component. These results suggest that 30% fluorine in the 50HoF3–20BaF2–10AlF3–20GeO2 system is substituted by oxygen through pyrohydrolysis of the fluorides.