Abstract
Hollow calcium carbonates were precipitated by bubbling carbon dioxide into aqueous solution of calcium chloride in the presence of ammonia. The precipitation was carried out by control of reaction condition such as temperature, pH and impurities. Transformation of vaterite into calcite plays an important role on the precipitation of hollow calcium carbonate. It is known that concentration of magnesium ion influenced the morphology and shape of calcium carbonate precipitate. In this study was discussed the relation between hollow calcium carbonate growth and concentration of magnesium ion.
