A　series　of　color-tunable　Ca3-2x-y-zSiO4Cl2　(CSC):xCe(3+),xLi(+),yMn(2+),zEu(2+)　phosphors　with　low　temperature　phase　structure　was　synthesized　via　the　sol-gel　method.　An　energy　transfer　process　from　Ce3+　to　Mn2+　in　CSC:0.01Ce(3+),0.01Li(+),yMn(2+)　(y=0.03-0.09)　and　the　mechanism　was　verified　to　be　an　electric　dipole-dipole　interaction.　The　Ce3+　and　Mn2+　emission　intensities　were　greatly　enhanced　by　co-doping　Eu2+　ions　into　CSC:0.01Ce(3+),0.01Li(+),0.07Mn(2+)　phosphors　due　to　competitive　energy　transfers　from　Eu2+/Ce3+　to　Mn2+,　and　Ce3+　to　Eu2+.　Under　332nm　excitation,　CSC:0.01Ce(3+),0.01Li+,0.07Mn(2+),zEu(2+)　(z=0.0005-0.002)　exhibited　tunable　emission　colors　from　green　to　white　with　coexisting　orange,　green　and　violet-blue　emissions.　These　phosphors　could　have　potential　application　in　white　light-emitting　diodes.