EFFECT OF PRECIPITATION CONDITIONS ON THE MORPHOLOGY OF CALCIUM-CARBONATE - QUANTIFICATION OF CRYSTAL SHAPES USING IMAGE-ANALYSIS

Extra-pure calcium carbonate was obtained in the laboratory by carbona tion of a solution of calcium nitrate and monoethanolamine with carbon (IV) oxide under various operating conditions. The particle size and s hape of the samples obtained were characterized by image analysis. The results show that the method of quantitative morphological characteri zation using defined shape descriptors enables us to get a better insi ght into the relationship of the mineralogical composition and particl e size/shape to precipitation conditions. (C) 1998 Elsevier Science S. A. All rights reserved.