1but how????
Can u explain a bit in detail?
In NCERT Chemistry textbook, it says that AgBr shows both Frenkel and Schottky defects. Is this correct????
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17 Answers
33The ratio of ions are such that both are possible..
few Ag+ are displaced to interstitials and few Ag+ escapes with Br-
So u can say it shows both defects..
As feenyx.. said under some conditions... one defect will be more and under some conditions other will be more..
In any crystal of any comp.. many defects are there but it said that it shows a particular defect... because one dominates..
1hey ... its not like simultaneously both schottky and frenkel defects will act on AgBr .. wat the Ncert means is that it can display both frenkel and schottky defects under certain conditions ...Its like when u heat a sample of AgBr it will show schottky defect(similar to vacancy defect)..
and not Frenkel defect.. so under other conditions it will show frenkel defects..
11Frenkel won't allow Schottky to dec density and Scottky won't allow Frenkel to let density remain the same. So who will win and why??? [7]
1density will of course decrease......both effects r independent of each other.....Schottky n Frenkel both are doing their work....they cant stop each other
11Ok. Let us assume that it shows both defects. For Frenkel, density remains the same. For Schottky, density decreases. What happens to AgBr? Will it dec. or remain the same???????
11@ Srinath and anybody who does not get the point of the question,
Ag+ and Br- are of similar sizes and have large size difference at the same time????? [7][2]
11I have posted the excerpts from the NCERT textbook [1]
Pls read through the paragraph fully and notice the conditions necessary for Frenkel and Schottky defects [1]
Pls reply