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All of the following share the same crystal structure except - [JEE-Main On line-2018]

1. RbCl
2. NaCl
3. CsCl
4. LiCl

Correct answer: CsCl

Solution

NaCl, RbCl and LiCl all crystallize in the rock-salt (NaCl) structure with 6:6 coordination. CsCl adopts the body-centred-cubic CsCl structure with 8:8 coordination, so it is the exception.

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