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Experimental Investigations of Precipitation Patterns

  • Stefan C. Müller
Part of the NATO ASI Series book series (NSSB, volume 116)

Abstract

If a soluble electrolyte is placed in contact with a second electrolyte and, on interdiffusion, both react to form a weakly soluble salt, a metastable supersaturated solution can be produced. For many combinations of electrolytes at suitable concentrations the subsequent precipitation process does not occur continuously in space. Instead, well-separated bands of precipitate appear parallel to the front surface of the diffusing ions, sequentially in a period of hours to several days starting at the initial interface of the two reagents. Usually a gel-forming material is added to the solutions to prevent sedimentation and hydrodynamic convection. Such a periodic precipitation, commonly called the Liesegang phenomenon, was first observed in 1896 /1/ and since then investigated by many authors /2/.

Keywords

Colloidal Particle Precipitation Pattern Band Location Liesegang Ring Lead Iodide 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Press, New York 1984

Authors and Affiliations

  • Stefan C. Müller
    • 1
  1. 1.Max-Planck-Institut für ErnährungsphysiologieDortmundGermany

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