Spectral structure of barium-phosphate-silicate phosphor Ba10(PO4)4(SiO4)2:EuM+

► We studied Ba10(PO4)4(SiO4)2:Eu2+ whose emission spectra are composed of a broad band and one group of line emission peaks. ► The phosphor emission at 507 nm is ascribed to anomalous fluorescent emission. ► The line emission peaks at 595 nm and 613 m were due to 5D0→7F1 and 5D0→7F2 transition of Eu3+. ► The phosphor emits pseudo white light under irradiation with UV light.