Explain the following terms with suitable examples: (i) Schottky defect (ii) Frenkel defect (iii) Interstitials and (iv) F-centres
Answers
Answered by
30
This is helpful for you
Attachments:
Anonymous:
make it brainlist
please
F-centre is the site containing the electron in the vacancy of anion and responsible for imparting colour to Crystal
interstial means vacant space between the two elements or particles
it okk
Answered by
100
Answer :
(i) Schottky defect : When an atom or ion is missing from its normal site, a lattice vacancy (Schottky defect) is created. Equal number of cations and anions are missing in ionic solids, e.g., in NaCl, there is Schottky defect.
(ii) Frenkel defect : When an atom or ion occupies interstitial position instead of normal position, it leads to Frenkel defect. In AgCl, Frenkel defect is found.
(iii) Interstitials : The vacant positions in the crystal lattice are called interstitials or voids, e.g., transition metals have interstitials.
(iv) F-centres : Electrons trapped in anion vacancies are called F-centres. If we heat NaCI in sodium vapours, the vacant position of anions are occupied by electrons forming F-centres.
Similar questions