Abstract
The carbonation of Mg(OH)2 by carbon dioxide in air was examined. Compound, chemical composition, and surface property of the calcareous deposit formed in tidal zone were investigated.
As a result of the carbonation of Mg(OH)2, dypingite was formed. Inside of the calcareous deposits composed of rust and Mg(OH)2 and dypingite. Outside of the calcareous deposits composed of aragonite and dypingite. Thus, it is considered dypingite in the calcareous deposit were formed from Mg(OH)2.
