molecule
ion
electron
atom
conducting solid
network solid
covalent solid
ionic solid
Frenkel defect
Schottky defect
Vacancy defect
Metal deficiency defect
some cations move from their lattice site to interstitial sites.
equal number of cations and anions are missing from the lattice.
some lattice sites are occupied by electrons.
some impurity is present in the lattice.
positive
neutral
negative
depends on concentration of p impurity