Calcium carbonate

Origins

Calcium carbonate is one of the most prevalent minerals found on Earth, constituting approximately 4% of the Earth’s crust. It occurs naturally in three primary rock varieties: chalk, limestone, and marble.

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Ground Calcium Carbonate (GCC) - Formed by Nature Over Millions of Years

The majority of calcium carbonate deposits originate from the remains of marine life that settle at the bottom of shallow seas. These marine organisms, including crustaceans, algae, and coral, absorb calcium carbonate from their aquatic surroundings to build their skeletons and shells. Upon death, their remnants accumulate on the sea floor, eventually compounding to form rock over time.

Chalk is a softer rock type, resulting from inadequately compacted sedimentary calcium carbonate that has not completely undergone diagenesis. As the sedimentation process fully occurs, it leads to the development of limestone.

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Marble, recognized as the hardest form of calcium carbonate, is classified as a metamorphic rock stemming from the recrystallization of limestone under conditions of elevated pressure and temperature.

Precipitated Calcium Carbonate (PCC) - Manufactured by Humans in Just Hours

Calcium carbonate can also be synthetically produced as Precipitated Calcium Carbonate (PCC). This is achieved through the conversion of limestone into CaO and CO2, followed by a reaction between these purified elements in a chemical reactor. The resulting product shares the same chemical makeup as GCC but boasts higher purity and varies in particle size distribution and shape.

The exceptional whiteness and opacity of carbonates make them suitable for a multitude of applications, ranging from construction materials to paper, paint, and food products.

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