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The unit cell of calcite

Calcite is one of the most common minerals on the Earth's surface. It is a often part of sedimentary rocks, especially limestone. It is also the primary mineral in metamorphic marble.

It is a chemical or biochemical calcium carbonate with the formula CaCO3. It is a carbonate mineral. It can be a vein mineral in deposits from hot springs, and in caverns as stalactites and stalagmites.

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