Abstract
To prevent the scale formation in the evaporation of sea water or brine, we deviced the method “the addition of crystal seeds”, using the calcium sulfate crystals as seeds.
In this paper, we studied on the identi fication of the water of crystallization of calcium sulfate. Three method were adopted, there are the method by the X-rays diffractometer, by the phase-contrast microscope, and using the heavy liquid media, respecitively.
The results are as follows: X-rays diffractometer was excellent in the point of accuracy and heavy media separation or phase-constrast microscope was simple in handling but was insufficient in the point of quantitative analysis.
