Question

plz tell diff bw schottky defect and frankel

Answer 1

Hey dear...

Here is your answer...

They both are differ in such a way :

First of all both are present in ionic solids.

Frenkel defect:- It is also known as Dislocation defect because in this defect some smaller ions(generally cations) gets dislocated from its normal position to interstitial space.

It is generally found in those ionic substances which have large size variation between cation and anion and low co-ordination number. For example- ZnS,AgCl,AgI,AgBr(although AgBr show both frenkel and schottky defect) etc.



Schottky defect:- In some ionic solids some cations and proportionate number of anions go out missing from their lattice. Though number of anion and cation remain equal(not same as few cations and anions have left the crystal) they remain electrically neutral.

It is generally found in solids having comparable carbonic and anionic radii and with high co-ordination number. Highly ionic substances like NaCl,KCl,CsCl,CsBr etc show this defect.

Hope it helps you!! ¡

Answer 2

heyy dear ur answer.............

#Schottky and Frenkel defects are known as point defects.

#Schottky defect is characterized by the vacancies of ions or atoms out of the lattice.

#Frenkel defect is characterized by the displacement of ions or atoms within the crystal structure.

#Schottky defect can occur in non-metallic and metallic compounds.

#Frenkel defect occurs in ionic compounds.

#Schottky defect changes the mass and consequently the density in a constant volume.

#Frenkel defect does not affect the mass and the density.

#Schotty defect usually happens in a lattice with ions or atoms of the same.

#Frenkel defect occurs in lattice with ions of different size

hope this will help u..........@kundan