Question

Why does frankel defect not change density of a solid?

Answer 1

A Frankel defect or dislocation defect is a type of defect in crystalline solids where in an atom is displaced from its lattice position to an interstitial site.
since the same atom changing it's position in lattice and taking place of interstial(free) site.then it doesn't cause of change in density...

let me explain you with an example...
suppose you have box and it has 20 marbles and you measured density of box after that you change many Mable's position is this leads to change in density...think by urself