Solid State Question 33
Question: For fcc, if AB is just like the rock salt like structure then, $ {{A}^{+}} $ and $ {{B}^{-}} $ are located at -
Options:
A) $ {{A}^{+}} $ - Tetrahedral voids ; $ {{B}^{-}} $ - Corner
B) $ {{A}^{+}} $ - Corner and faces; $ {{B}^{-}} $ - Octahedral voids
C) $ {{A}^{+}} $ - Octahedral voids; $ {{B}^{-}} $ - Corner and faces
D) $ {{A}^{+}} $ - Corner and faces; $ {{B}^{-}} $ - Octahedral and tetrahedral voids
Show Answer
Answer:
Correct Answer: C
Solution:
[c] AB is just like $ NaCl $ . Thus twelve $ {{A}^{+}} $ are at edges and 1 within body of fcc i.e. in octahedral voids and six $ {{B}^{-}} $ at faces and 8 at corner.
BETA
