P. Klepetsanis, P. Koutsoukos
Nov 2, 1989
Citations
2
Influential Citations
45
Citations
Journal
Journal of Crystal Growth
Abstract
Abstract The formation of calcium sulfate is important in a number of environmental geological, industrial and energy production processes. At constant calcium activity at 25°C, the kinetics of precipitation were found to be independent of pH, and an apparent order of reaction of n = 4, significantly different from the order of 2 found by seeded growth experiments, suggested a polynucleation mechanism. The electrophoretic mobility of the calcium sulfate dihydrate particles showed a marked dependence on the solution pH, which may affect the crystal growth of the initially formed calcium sulfate dihydrate crystallites by altering the Ca 2+ / SO 2- 4 ratio on their surface.