A novel method for the synthesis of metal carbonates .1. Synthesis and infrared spectrum of manganese carbonate, MnCo3.H2O, formed by the reaction of urea with manganese(II) salts

Manganese(II) carbonate, MnCO3.H2O, is obtained by a new synthetic method involving the reaction of aqueous solutions of MnCl2, Mn(NO3)(2), MnSO4 or Mn(CH3COO)(2) with urea at similar to 80 degrees C. The infrared spectrum of the formed product clearly indicates the absence of bands due to urea and shows the characteristic bands of carbonate ion. A general mechanism describing the formation of manganese carbonate, MnCO3.H2O, is suggested.