Glasses in the system of MnNbOF5-BaF2-BiF3-ErF3

►New oxyfluoride glasses are obtained in the MnNbOF5-BaF2-5BiF3-ErF3 system. ►The structure of glasses is studied by vibration spectroscope methods. ►The thermal parameters and crystallization products of the glasses are found. ►The studies of inelastic light scattering by Raman spectra of glasses are performed. ►We revealed a strong photoluminescence, produced by erbium emission.