Question

dfine frankle defect..

Answer 1

A Frenkel defect or dislocationdefect is a type of defect in crystalline solids wherein an atom is displaced from its lattice position to an interstitial site, creating a vacancy at the original site and an interstitial defect at the new location without any changes in chemical properties.

Answer 2

it is the defect which occurs in the arrangement of a crystalline substance due to the creation of vacancy due to removal of an atom from the lattice structure .
Here there is some change in physical properties but not in chemical ones