Planar ones involve interfaces between material regions, and the number of vacancies resulting from point ones can be computed using the Boltzmann factor.  
The linear type of this phenomenon include screw and edge dislocations and their direction and strength can be calculated with the help of the Burgers vector. Planar ones involve interfaces between material regions, and the number of vacancies resulting from point ones can be computed using the Boltzmann factor.  Interstitial ones involve atoms being squeezed between vertices, while twin boundaries give rise to shape memory metals. With the point type existing in Frankel and Schottky types, FTP, identify these "mistakes"  in the lattices of regular solids.
The linear type of this phenomenon include screw and edge dislocations and their direction and strength can be calculated with the help of the Burgers vector.
crystal defects