what type of lattice defects is responsible for the existence of non-stoichiometric compounds of AB type
Answers
Answered by
3
Answer:
a large number of non-stoichiometric inorganic solids are known which contain the constituent elements in non-stoichiometric ratio due to defects in their crystal structures.
These defects are of two types:
(a) Metal Excess Defect and (b) Metal Deficiency Defect.
(i) Metal Excess Defect
Metal excess defect due to anionic vacancies: In this case, negative ions may be missing from their lattice sites leaving holes in which the electrons remain entrapped to maintain the electrical neutrality.
(b) Metal Deficiency Defects
These contain less number of positive ions than negative ions. These arise due to two ways:
(i) Cation Vacancies
(ii) Extra anions occupying interstitial sites
Similar questions