The calcite crystals precipitated from pure supersaturated calcium carbonate exhibit mainly two habits:flat like rhombic crystal and rhombohedral crystal similar to a cube.

• 纯碳酸钙过饱和溶液析出的碳酸钙晶体有两种主要的形态:薄片状菱形晶体和类似立方体的菱方体晶体。