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Calc-sinter (Sinter is an important category in German chemistry)
Term for a solid calcium carbonate deposit in a solution during or after the chemical reaction of precipitation. The deposit is found in caves, mineral springs and also - as a coating or even thick layer - in old aquaeducts or waterpipes. If it were more compacted (e.g. recrystallized) and deposited uniformly it could be called Travertine.

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Calc-sinter". A list of authors is available in Wikipedia.
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