Chemistry Letters, Vol.31, No.10, 960-961, 2002
High yield of vaterite precipitation induced by trace lanthanum ion from a supersaturated solution of calcium carbonate at 50 degrees C
The formation of calcium carbonate from a Supersaturated solution doped with trace lanthanum was studied at various temperatures. At a temperature of around 50degreesC, more than 80% of calcium carbonate precipitated from 5 mumol kg(-1) LaCl3, 15 mmol kg(-1) CaCl2-NaHCO3 solution was vaterite while from a lanthanum-free solution carbonate precipitated exclusively as calcite.