A blue-greenish phosphor,KCaPO4:Eu2+,was prepared by the high temperature solid-state method,and its luminescent characteristics were investigated.The emission and excitation spectra indicate that it can be effectively excited by ultraviolet and near ultraviolet(300-450 nm) light,and exhibits satisfactory bluegreenish performance(487 nm).The crystallographic sites of Eu2+ in KCaPO4 were calculated by the van Uitert formula.The results show that the 478 nm emission band originates from the eight ...