Abstract

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 GaHlg4− (Hlg = Cl, F) with Td symmetry and GaOHlg32− with C3v 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.

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