The Occurrence of Growth Dispersion and Its Consequences

  • A. H. Janse
  • E. J. De Jong


In our laboratory some experiments with K2Cr2O7 crystals in a fluidized bed have been carried out in order to determine the influence of the supersaturation and the size of the crystals on the growth rate. It was found that the growth rate of the crystals increased with size (see Table 1). Furthermore it appeared that after an experiment a spread in sizes was present. This was observed when the increase in size was large (Fig. 1). As seed crystals with a narrow size range were used it can be concluded that the increase in size and as a consequence the growth rate differs from crystal to crystal. As the supersaturation was kept constant within 5% the only reasonable explanation is that crystals of one size exhibit a spread in growth rates. We have called this phenomenon ‘growth dispersion’.


Average Growth Rate Grown Crystal Seed Crystal Crystal Size Distribution Number Balance 
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Copyright information

© Plenum Press, New York 1976

Authors and Affiliations

  • A. H. Janse
    • 1
  • E. J. De Jong
    • 1
  1. 1.Laboratory for Chemical EquipmentDelft University of TechnologyDelftThe Netherlands

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