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Why two similar materials crystallise at different times?

  1. Sep 22, 2015 #1
    I have two ionic crystals (metal complexes). Both of them contain the same cation but the anion are different in one functional group. One is a CH3 and the other is a Cl. Both of the crystals have similar unit cell and space group. However, to obtain the same quality, one crystalise in 2 hrs and the other between 1 and 2 days. why?

    Think that it has to be with the thermodynamics of crystalllisation but I'm not sure how.

    What do you think?
     
  2. jcsd
  3. Sep 25, 2015 #2

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    Compare the number of degrees of freedom.
     
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