CALCIUM carbonate can exist in three polymorphic forms, which in the order of their usual stabilities are calcite, aragonite and vaterite. Calcite is the most stable and the least soluble ...

In the first experiment, they change the size of the calcium carbonate particles, using large lumps, small lumps and powder. In the second experiment, they change the concentration of the acid.

Trovants are rocks that grow by absorbing minerals from rainwater. Romania is home to a cluster of trovants that inspired ...