Raman Broad Scans of Rare Earth Oxide (REO) Glasses from RRUFF Database, Compared to the Raman spectra of RE Oxides from Raman Open Database

RRUFF database is proposing the Raman broad scans of glasses CaO-Al2O3-SiO2 with rare earth element (REE) oxides, that is of CaO-RE2O3-Al2O3-SiO2 glasses. Raman data are courtesy of E. Cairns, University of Edinburgh. Here we show how we can use the q-BWF functions to decompose these spectra. The q-BWF functions are generalizing the Breit-Wigner-Fano line shape in the framework of the q-exponential function proposed by Constantino Tsallis and his statistics. Besides asymmetry, the decompositions with q-BWF line shapes are stressing Gaussian and non-Gaussian behaviors of components. The data analysis of CaO-RE2O3-Al2O3-SiO2 glasses is highlighting the presence of photoluminescence regular patterns in the Raman broad scans. In another database, the Raman Open Database (ROD), we can find some spectra of rare-earth oxides. Therefore, it is possible to compare the available REO spectra with those of CaO-RE2O3-Al2O3-SiO2 glasses and study the broadening of the Raman bands.