Question

what is schotky defect?​

Answer 1

a defect in a crystal lattice created by removing an ion from its normal site and placing it on the crystal surface

Answer 2

It is a kind of defect in solids where equal number of cations and anions are absent from the respective sites. It is doesn't affect the electric neutrality of the solid however the overall density is somewhat decreased. It is found in solids having cations and anions of comparable sizes.