A series of red phosphors Eu3＋-doped MMgP2O7（M=Ca,Sr,Ba） were synthesized by solid-state reaction method.X-ray powder diffraction（XRD） analysis confirmed the formation of pure CaMgP2O7,SrMgP2O7 and BaMgP2O7 phase.Photoluminescence spectra of MMgP2O7（M=Ca,Sr,Ba）：Eu3＋ phosphors showed a strong excitation peak at around 400 nm,which was coupled with the characteristic emission（350-400 nm） from UV light-emitting diode.The CaMgP2O7：Eu3＋,SrMgP2O7：Eu3＋ and BaMgP2O7：Eu3＋ phosphors showed strong emission bands peaking at 612,593 and 587 nm,respectively.Due to the difference of the ion sizes between Ba2＋（0.142 nm）,Sr2＋（0.126 nm）,Ca2＋（0.112 nm）,Mg2＋（0.072 nm） and Eu3＋（0.107 nm）,Eu3＋ ions were expected to substitute for different sites in CaMgP2O7,SrMgP2O7 and BaMgP2O7 lattice.
