Electronic Absorption Spectra of GaCl3 and Ga2O3 Solutions in Chloride—Fluoride Melts.

Electronic absorption spectra of GaCl3 and Ga2O3 solutions in molten alkali metal chlorides and in NaCl-KCl-NaF and LiF-NaF melts were measured by reflection-absorption spectroscopy. The spectral data showed that the main structural units in the solutions are complexes GaHlg (Hlg = Cl, F) with T d symmetry and GaOHlg with C3 v symmetry, respectively. Molecular oxygen occurring in molten systems as an admixture causes exchange decomposition with formation in all the melts of molecular complexes of chlorine, Cl2Cl−, with C∝ v symmetry. [ABSTRACT FROM AUTHOR]