The manganese(II), cadmium(II), magnesium(II) and calcium(II) carbonates, respectively, were achieved by a novel synthetic route through the reaction of aqueous solutions of Mn(HCOO)2.xH2O, Cd(HCOO)2, Mg(HCOO)2.2H2O, or Ca(HCOO)2 with a low cost precursor like urea at ~ 85 oC for 12 hrs. The infrared spectra of the results indicate absence of the individual bands of urea, but exhibited of the characteristic bands of ionic carbonate, CO3 2–. A general reaction mechanisms describing the preparation of Mn(II), Cd(II), Mg(II) and Ca(II) carbonate compounds were discussed.