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Question: Answered & Verified by Expert
$C s B r$ crystal has bcc structure. It has an edge length of 4.3 Å. The shortest interionic distance between $\mathrm{Cs}^{+}$and $\mathrm{Br}^{-}$ions is
ChemistrySolid StateJEE Main
Options:
  • A $1.86 Å$
  • B $3.72 Å$
  • C $4.3 Å$
  • D $7.44 Å$
Solution:
1556 Upvotes Verified Answer
The correct answer is: $3.72 Å$
Closest approach in bcc lattice
$=\frac{1}{2}$ of body diagonal $=\frac{1}{2} \times \sqrt{3} a=\frac{\sqrt{3}}{2} \times 4.3=3.72 Å$

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