Eu 2+ ) phosphors were successfully synthesized by an amorphous metal complex method using propylene glycol-modified silane (PGMS) and heat-treatment under a reduced atmosphere at 1400 °C. The photoluminescence (PL) of Ca 3 MgSi 2 O 8 :Eu 2+ was studied as a function of total Eu concentration. Furthermore, Ca 3 MgSi 2 O 8 with Eu 2+ concentrations at 1.030 % for Ca exhibited a blue-green emission peaking at approximately 480 nm. In contrast, with increasing Eu 2+ concentration up to 50 % for Ca, the emission peak of Ca 3 MgSi 2 O 8 :Eu 2+ phosphors exhibited a redshift to 521 nm with green emissions. The redshift of emissions in Ca 3 MgSi 2 O 8 :Eu 2+ phosphors could be attributed to the strong electrostatic interactions related to the Eu 2+ ions occupying the peculiar Ca sites.