question_answer

  State the differences between Schottky and Frankel defects. Which of these two changes the density of the solid?                                                                                                                                                                                                             2

Answer:

   

Schottky	Frenkel defect
1. Some ions are missing from their normal sites.	Ions do not leave the lattice but occupy position elsewhere in it.
2. It lowers the density of crystals.	No change in density of crystal.
3. e.g.,	e.g.,

                  In Schottky defect, presence of holes, because of missing ions, lowers the density of crystal.