We report fluorescence spectra of Eu~(3+) ions at 20K in oxyfluoride glass host containing LaF_3 nanocrystals. Eu~(3+) ions in nanocrystals were selectively excited at 397nm and ~5D_0 ->~7F_(0.12) emission were observed. It is found from the Stark splitting of ~7F_1 level that the crystal field of the precipitated crystals is similar to that in LaF_3, single crystal from the beginning of crystallization.
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