Mixed crystals of Calcium-Barium Tartrate were grown by a single diffusion method. The optimum conditions were established by varying various parameters such as pH of gel solution, gel concentrations, gel setting time, concentration of reactants etc. Crystals having different morphologies were obtained .Whitish semitransparent, pale yellow, rhombohedral shaped, needle shaped crystals of Calcium-Barium tartrate were obtained. Some of them were transparent diamond shaped, some are twined. Maximum sizes of the grown crystals are 5mm×3mm and thickness about 2to3mm. The crystals grown were characterized by X-ray powder diffractometry and Energy Dispersive Analysis by X-rays (EDAX). The results of these observations are described and discussed.