2

3

4

6

Dislocation defect

Schottky defect

Frenkel defects

Electronic defects

p-type semiconductor

n-type semiconductor

intrinsic semiconductor

insulator

Paramagnetic substances are weakly attracted by magnetic field.

Ferromagnetic substances cannot be magnetised permanently.

The domains in anti-ferromagnetic substances are oppositely oriented with respect to each other.

Pairing of electrons cancels their magnetic moment in the diamagnetic substances.

Bigger ions form the close packed structure.

Smaller ions occupy either the tetrahedral or the octahedral voids depending upon their size.

Occupation of all the voids is not necessary.

The fraction of octahedral or tetrahedral voids occupied depends upon the radii of the ions occupying the voids.