Structure and Morphology of Electrodeposited CaCO3: X‐Ray Diffraction and Microscopy Studies

The structure and morphology of electrochemically deposited calcium carbonate have been investigated as a function of temperature, magnesium ion concentration, organic inhibitors, and deposition potential. At 25°C, microcrystals of calcite grew with their [104] planes parallel to the electrode surface. In the presence of magnesium chloride, a mixed phase of calcite and magensium calcite, as well as aragonite, was formed. Organic inhibitors varied in their effectiveness in inhibiting calcite formation, e.g. , 2‐phosphonobutane, 1,2,4‐tricarboxylic acid (PBTC) performed better than ethanediphosphonic acid (EDPA). © 1999 The Electrochemical Society. All rights reserved.