B. Aragonite: Modern corals are aragonite, and mollusk shells (snails, clams, Nautlius) are made of a mixture of aragonite and calcite. Plain aragonite is chalky (think of the exterior of a clam shell ...

How soft corals defy their environment: Protein favors calcite formation in aragonite sea Date: August 16, 2011 Source: Ludwig-Maximilians-Universitaet Muenchen (LMU) ...

For example, aragonite is more susceptible to low pH levels because it has nine oxygen atoms bound to calcium, making its bonds weaker than those of calcite. Conversely, calcite’s bonds are less ...

Key Chemicals Month This month we feature chemicals that have important applications in industry and the lab.—Ed. Calcium carbonate (CaCO 3) is a natural product found in many settings, including the ...

Acanthopleura granulata) were much more remarkable than anyone had realized. Their unusual aragonite lens can detect the difference between a looming black circle and a generally gray field of vision.