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 ...

To do this we first precipitated calcium sulphate or gypsum, another building material, and then carried out the same process to successfully turn CO2 into calcium carbonate, thus providing proof ...

Precipitated calcium, often referred to as PCC ... the byproduct of smelting — as part of its calcium carbonate production process. Slag often goes unused and is dumped. CarbonFree has already ...