In　this　study,　[Sr0.99Eu0.01](3)MgSi2O8　phosphors　were　sintered　at　1200-1400　degrees　C　for　1-5　h　by　using　the　solid-state　reaction　method.　The　crystallinity　and　morphology　of　these　phosphors　were　characterized　through　X-ray　diffraction　analysis　and　field-emission　scanning　electron　microscopy,　respectively,　to　determine　their　luminescence.　The　photoluminescence　properties,　including　the　excitation　and　emission　properties,　of　the　prepared　phosphors　were　investigated　through　fluorescence　spectrophotometry.　The　alpha-Sr2SiO4,　Sr2MgSi2O7,　and　Sr3MgSi2O8　phases　coexisted　in　the　[Sr0.99Eu0.01](3)MgSi2O8　phosphors,　which　were　synthesized　at　low　temperatures.　The　particles　of　these　phosphors　had　many　fine　hairs　on　their　surface　and　resembled　Clavularia　viridis,　which　is　a　coral　species.　Transmission　electron　microscopy　and　energy　dispersive　X-ray　spectroscopy　indicated　that　the　fine　hairs　contained　the　Sr2SiO4　and　Sr2MgSi2O7　phases.　However,　when　the　[Sr0.99Eu0.01](3)MgSi2O8　phosphors　were　sintered　at　1400　degrees　C,　the　Sr3MgSi2O8　phase　was　observed,　and　the　Eu2+-doped　Sr3MgSi2O8　phase　dominated　the　only　broad　emission　band,　which　had　a　central　wavelength　of　457　nm　(blue　light).　The　emission　peaks　at　this　wavelength　were　attributed　to　the　4f(6)5d(1)-4f(7)　transition　at　the　Sr2+(I)　site,　where　Sr2+　was　substituted　by　Eu2+.　The　average　decay　time　of　the　synthesized　phosphors　was　calculated　to　be　1.197　ms.　The　aforementioned　results　indicate　that　[Sr0.99Eu0.01](3)MgSi2O8　can　be　used　as　a　blue-emitting　phosphor　in　ultraviolet-excited　white　light-emitting　diodes.