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calcite |
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calcite) Calcite through a polarized microscope. Calcite is the main constituent of limestone and marble. Colourless, white, or light-coloured common rock-forming mineral, calcium carbonate, CaCO3. It is the main constituent of limestone and marble and forms many types of invertebrate shell. Calcite often forms stalactites and stalagmites in caves and is also found deposited in veins through many rocks because of the ease with which it is dissolved and transported by groundwater; oolite is a rock consisting of spheroidal calcite grains. It rates 3 on the Mohs scale of hardness. Large crystals up to 1 m/3 ft have been found in Oklahoma and Missouri, USA. Iceland spar is a transparent form of calcite used in the optical industry; as limestone it is used in the building industry. |
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1999) generated a large database of several thousand well-preserved calcitic shells that cover this entire 545 million years time span. The Dover chalks are an unfortunate choice for comparison because they're composed primarily of the calcitic remains of microscopic marine phytoplankton. had shown increasing sheet gloss and decreasing print gloss trends as the average particle size decreased when using calcitic precipitated calcium carbonate (PCC) pigments with a prismatic morphology. |
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calcitic
