Abstract
Cobalt(II) carbonate, CoCO
3·4H
2O and lead(II) carbonate, PbCO
3·2H
2O were synthesis by a new simple method during the reaction of aqueous solutions of CoX
2 (X = Cl
−, NO
3
− and CH
3COO
−) and PbX
2 (X = NO
3
− or CH
3COO
−), respectively, with urea at ∼85
°C for 2
h. The infrared spectra of the reaction products clearly indicates the absence of the bands due to coordinated urea, but show the characteristic bands of ionic carbonate. A general mechanisms describing the formation of cobalt and lead carbonates are suggested.