Crystals Final

Vacancy

A site within a crystal that is typically occupied but is now vacant

Extrinsic defect

defects caused by the introduction of impurity or alloying elements such as substitutional or interstitial defects

Intrinsic defect

Defect that arises without additional impurity atoms to the crystal such as vacancies, self interstitials, schottky, and frenkel defects

Frenkel Defect

Vacancy interstitial pair

Schottky Defect

Cation-Anion vacancy grouping

Which atom is most likely to form a frenkel defect in a formula unit

The cation with the smallest radius

How is the tangent vector oriented relative to the burgers vector in a screw dislocation

Parallel

How is the tangent vector oriented relative to the burgers vector in a edge dislocation

perpendicular

What is the condition that determines if a loop is a glide loop

If the dot product of the burgers vector and the plane normal is 0

How can you determine if a plane is a glide plane for a dislocation

The tangent and burgers vector must both be in the plane, so if you take their cross product you will find the vector of the plane normal.

What is the magnitude of the Burgers vector of the perfect or unit dislocation

It is equal to one lattice translation (lattice parameter), but if a slip system is given it is the magnitude of the given burgers vector