| Autor: |
Antonious, M. S., Ramsis, M. N., Youssef, A. O. |
| Zdroj: |
Monatshefte für Chemie / Chemical Monthly; January 1996, Vol. 127 Issue: 1 p15-27, 13p |
| Abstrakt: |
The kinetics of the crystallization of barium chromate have been studied conductometrically at 298 K for both spontaneous and seeded growth systems. The rate of growth follows a quadratic dependence upon the relative supersaturation which suggests a surface-controlled growth mechanism. This rate equation holds fairly well for the various supersaturation and solid/solution ratios used. The presence of seeds in the solution appears to accelerate the growth rate. Analysis of the calculated induction times in unseeded systems corroborates the surface-controlled growth mechanism. The effect of some additives on the kinetics of growth has also been studied. The retarding effect of these inhibitors is interpreted in terms of adsorption of inhibitor ions at the active crystal growth sites. |
| Databáze: |
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