The precipitated calcium carbonate was synthesized in an emulsion of reaction mixture. The starting materials were calcium chloride, potassium carbonate. Benzene and xylene were used as aromatic solvents, and Span 60 and Tween 80, as non-ionic surfactants. Calcium carbonate was synthesized at various reaction conditions such as reaction temperature, reaction time, solvent and the reaction method. Shape and crystal structure of the reaction product, calcium carbonate, were identified by SEM and XRD. Particle size distribution of calcium carbonate was measured by the light scattering method. The reaction temperature, type of solvents and the reaction method were found to have large effect on the shape and crystal structure of calcium carbonate.