Published by:
CGP EDU Academic Team
Published on: August 12, 2026
Consider the figure given for solid XY. Answer the following questions
(i) The site Y represents
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CHECK THE SOLUTION.
(i) In FCC lattice each edge center act as octahedral void.
(ii) No. of X = 8 × 
+ 6 × 
= 4 ⇒ 4 XY unit per cell.
No. of Y = 1 + 12 × 
= 4
(iii) At edge center, there is octahedral void in f.c.c. lattice.
⇒ C.N. of Y = 6
(6 : 6) C.N. ⇒ NaCl Structure.
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