Present study deals with Eu3+ activated novel alkaline earth metal (Sr and Ca) gallium oxide phosphors, Sr(2.92-x)Ca(x)Ga2O6:Eu-0.08(3+) (x = 0 to 2.92). Crystal structure, morphology and luminescence (excitation, emission and CIE coordinate) properties of these phosphors have been studied as a function of Ca concentration. Doping of Ca ions into Sr2.92Ga2O6:Eu3+ phosphor gives rise to a significant enhancement in overall fluorescence and the optimum emission is attained for pure Ca2.92Ga2O6:Eu3+ phosphor for x = 2.92. The intensity ratio of (D0 -> F2)-D-5-F-7 to (D0 -> F1)-D-5-F-7 transitions (monochromaticity) of Eu3+ for different doping concentration of Ca suggests that asymmetry around the Eu3+ ion increases with increase in Ca ion concentration, which is responsible for enhanced emission. The excellent optical features, such as broad excitation band (230-480 nm) and excellent emission in red region (at 614 nm), conclude that calcium gallet phosphor could be a potential candidate for light emitting diodes and display applications. (c) 2012 Elsevier Ltd. All rights reserved.