All of the following share the same crystal structure except :
Show Hint
- LiCl
- NaCl
- RbCl
- CsCl
The Correct Option is D
Solution and Explanation
LiCl, NaCl and RbCl have radius ratios in the octahedral range (0.414 to 0.732), so they all adopt the rock-salt (NaCl-type) structure with coordination number 6:6.
CsCl has a large cation (\(r_+/r_- \approx 0.93\), in the range 0.732 to 1), so it adopts the CsCl-type (body-centred cubic) structure with coordination number 8:8.
So CsCl is the exception.
Answer: (4) CsCl
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