Exercise 2.1-6

Enthalpy difference for the limiting cases of Schottky or Frenkel Defects

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.
  Link to the Solution

With frame With frame as PDF

go to Formation Enthalpies and Entropies for Vacnacies an Self-Interstitials

go to 2.1.4 Mixed Point defects

go to Solution to Exercise 2.1-6

go to Exercise 2.1-8 Quick Questions

go to Point Defects in Ionic Crystals

go to Formation Enthalpies and Entropies for Frenkel and Schottky Defects

© H. Föll (Defects - Script)