Calcite Phase Determination of CaCO_3 Nanoparticles Synthesized by One Step Drying Method

摘要

Calcium Carbonate (CaCO_3) is a type of carbonic salt. It exist naturally as white odourless solid and may also be synthesized by chemical reactions. This work studies one-step precipitation of CaCO_3 that was prepared by novel method of one-step precipitation method. The method was then proceeded by different types of drying. The first type is by normal drying in oven whereas the second type is with the presence of hydrothermal influence. From the results, precipitated CaCO_3 dried by normal drying method produces CaCO_3 with two polymorphs present; calcite and vaterite. Normal drying at 500°C has no vaterite phase left. Drying by hydrothermal precipitated CaCO3 has Nitrogen (N) left on the surfaces of the precipitated CaCO_3. This work successfully identified calcite phase in the precipitated CaCO_3.