The equations for the concentration of the three point defects contain in parts the differnce of the formation enthalpies of Schottky or Frenkel defects. | ||

Calculate the ratio of the concentration of Schottky to Frenkel defects as a function of this enthalpy difference. | ||

Discuss the result. Show in in particular, how large the
difference must be if 90% or 99%, resp., of the defects are to be
of one kind. |
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Link to the
Solution |
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Formation Enthalpies and Entropies for Vacnacies an Self-Interstitials

Exercise 2.1-8 Quick Questions

Point Defects in Ionic Crystals

Formation Enthalpies and Entropies for Frenkel and Schottky Defects

© H. Föll (Defects - Script)