The BCCF - for information about calcium carbonate

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Calcium Carbonate

The World's Most Versatile Mineral

Calcium Carbonate Glossary

Chalk

Chalk is a poorly compacted sedimentary rock predominately composed of compacted coccoliths (a lime-secreting algae).

Dolomite

Formed as limestone (see below) but the sedimentation process occurs in the presence of magnesium resulting in a dolomitisation process.

Limestone

Limestone is also a sedimentary rock, but it is more compacted than chalk. It is formed from the remains of microscopic animals or foraminifera.

Marble

Marble is a coarse-crystalline, metamorphic rock, which is formed when chalk or limestone are recrystallised under conditions of high temperature and pressure.

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Calcium Carbonate - history

Uses of CaCO3 from prehistory to modern times

history of calcium carbonate uses from prehistory to the middle ageshistory of calcium carbonate uses from the middle ages to the industrial revolutionhistory of calcium carbonate uses from the  industrial revolution to modern times

Calcium carbonate has been used from as early as 40,000 BC to present day. The history of calcium carbonate illustrates how we have been able to utilise the unique properties of this mineral in applications ranging from prehistoric cave paintings to modern paper and plastic manufacturing.

Calcium carbonate uses over the ages – from prehistoric cave paintings and glass to rubber products used in modern cars.

The Anglo-Saxons referred to chalk as "Hwiting-melu", literally "whitening powder". And this was exactly what chalk was used for over the millenia, be it as a white pigment in paints, primers and plasters.

The main preconditions for the widespread of chalk over other forms of calcium carbonate, were the ease with which it could be quarried and processed. The Anglo-Saxons quarried chalk all around Dover on the South Coast. They found the soft rock could easily be quarried with simple tools such as saws and axes. Moreover it was usually sufficient to merely crush and grind the chalk chunks to produce a powder in the required quality

Chalk is still referred to as "whiting" to this day but, along with other forms of ground calcium carbonate including limestone and marble, is now used in a wide range of products that touch people every day lives. Calcium carbonate is one of the most widely used raw materials in the world and new applications are constantly being developed so it is likely that its use will continue to grow well into the next millenia.

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