摘要
///The behavior of calcite surfaces in the presence of Cd2+ and Pb2+ is investigated by in situ fluid cell Atomic Force Microscopy (AFM) to determine the differences between Cd/calcite and Pb/calcite interactions. Experiments are conducted on { 1054} cleavage faces exposed to Cd- and Pb-bearing solutions that are undersaturated with respect to calcite, otavite, and cerussite. In contrast, the much larger Pb2+ ions are believed to form distorted octahedral surface complexes to adsorb predominantly at the more open 〈441〉+ steps. The structural incompatibility between cerussite and calcite is speculated to account for the lack of step directions for the layer growth on calcite surfaces in the presence of Pb2+.