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aragonite

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aragonite

White, yellowish or grey mineral, calcium carbonate, CaCO3, a denser, harder polymorph (substance having the same chemical composition but different structure) of calcite.

Secreted by corals, molluscs and green algae, it is an important constituent of shallow marine muds and pearl.



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? Mentioned in ? References in periodicals archive
 
In nacre, 3,000 to 4,000 layers of offset, aragonite bricks are locked together by thin layers of organic glue.
Making the most of it: how nature turns weakness into strength by Cunningham, Aimee / Science News
Another example of microstructural control is that aragonite with complex microstructures can dissolve more rapidly than thermodynamically less stable magnesian calcite (Walter, 1985).
Investigations of burial diagenesis in carbonate hydrocarbon ... by Machel, Hans G. / Geoscience Canada
Precipitated calcium carbonate (PCC) has seen a trend away from rhombohedral (a spherical pigment) to aragonite PCC (an acicular pigment).
Coating pigments: from size and shape to nanotech by Klass, Charles / Solutions - for People, Processes and Paper
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