Question
Chemistry Question on The solid state
The correct statement regarding defects in solids is
Frenkel defect is usually favoured by a very small difference in the sizes of cation and anion
Frenkel defect is a dislocation defect
Trapping of an electron in the lattice leads to the formation of F-centre
Schottky defects have no effect on the physical properties of solids
Frenkel defect is a dislocation defect
Solution
Frenkel defect is favored by a large difference in the size of cations and anions. When an ion is missing from its normal position and occupies an interstitial site between the lattice points, Frenkel defect arises, hence it is a dislocation defect.
The electrons trapped in anion vacancies are referred to as F -centers
Schottky defects arise when some atoms or ions are missing from their normal lattice points. Due to the presence of a large number of vacancies in crystals, their density (i.e., physical property) is lowered.
_Discover More from Chapter: _Imperfections in Solids