Question

Write the conditions for the formation of Schottky defect. Name the factors governing the stability of the complex.​

Answer 1

Answer:

(a) Schottky Defect: This defect is caused if some of the lattice points are unoccupied. The points which are unoccupied. The points which are unoccupied are called lattice vacancies. The number of missing positive and negative ions is the same in this case and the crystal remains neutral. The existence of two vacancies, one due to a missing Na

+

ion and the other due to a missing Cl

−

ion in a crystal of NaCl. It appears in ionic crystals in which positive and negative ions do not differ much in size.

Answer 2

A Schottky defect is an excitation of the site occupations in a crystal lattice leading to point defects named after Walter H. Schottky. In elemental crystals it refers to simple lattice vacancies, also called valency defects.