Ba 2 MgSi 2 O 7 :xCe 3+ , yTb 3+ was synthesized by solid-state-reaction and X-ray powder diffraction analysis confirmed the formation of it. It has five emission bands peaking at 390 nm, 480 nm, 545 nm, 585 nm and 615 nm. White-light-emitting was obtained by mixing the five emissions.