Niederschlagsbildung-III Kristallwachstum und einfluss der fremdionenkonzentration in der bariumsulfatfällung.
The influence of foreign ions on the particle size of barium sulphate precipitates has been investigated by sedimentation experiments, establishing that NaCl, NaNO(3), KBr, KNO(3), and other salts at high concentrations powerfully hinder the growth of the crystals even at high supersaturation. The linear growth rate has been measured as a function of BaSO(4) concentration, foreign ion concentration and [BaCl(2)]/[K(2)SO(4)] ratio. Because the growth is already diffusion controlled at a fivefold supersaturation, the BaSO(4) precipitates will not undergo Ostwald ripening. A suitable apparatus has been devised for the investigations.
Liteanu
C
C
Lehrstuhl für Analytische Chemie der Universität von Cluj-Rumänien Germany.
Lingner
H
H