The Difference between Schottky defect and frenkel defects

The 

     Difference between 

Schottky defect and frenkel defect 

 Schottky defect :- 

                                (1)- same number of cations and anions are missing from there normal lattice sites.

Frenkel defect :- 

                               (1)- loans leave their normal position and occupy some whereelse in the interstitial site in crystal lattice. 

Schottky defect :- 

                                 (2)- It decrease the density of crystal mostly.

Frenkel defect :- 

                               (2) -The crystal density remain same .

Schottky defect :- 

                               (3)- The value of dielectric constant remain same . 

Frenkel defect:- 

                            (3)- value increased in dielectric constant . 

Schottky defect:-

                                 (4)- It observed in case of ionic compounds having high co-odination number .

Frenkel defect:- 

                              (4)- It observed in case of compounds having low co-ordination number .

Schottky defect :- 

                                  (5)- these are tracked in case of ionic compounds where cations and anions are almost of eqale size.

Frenkel defect:-
                               (5)- These are tracked in case of ionic compounds where cations are similar in size that anions.

Schottky defect :- 
                                   (6)- These are observed in case of alkali metal halides  .

Frenkel defect :- 
                                   (6) - These are observed in case of silver halides.