Electronic And Line Imperfections

which of the following decribes atomic imperfections?

Schottky defect defines imperfection in the lattice structure of a

Defects|Type Of Point Imperfections And Defects|Stoichiometric Defects|Non - Stoichiometric Defects|Question|OMR

Bragg''''s Equation,Defects or imperfections in Solids Schottky and Frenkel Defects, Non Stoichiometric Defects,Magnetic Properties,Piezoelectricity and Pyroelectricity