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The ionic radii of Rb^(+) and I^(-) are ...

The ionic radii of `Rb^(+) and I^(-) are 1.46 and 2.16 Å` .The most probable type of structure exhibited by it is

A

`CaCl`type

B

`NaCl` type

C

`ZnS` type

D

`CaF_(2)` type

Text Solution

Verified by Experts

The correct Answer is:
B
Radius Ratio `(e_(Rb+))/(r_(I^(-))) = (1.46)/(2.16) = 0.68`
` rArr` Between `0.414` and `0.732`
Hence Rock salt `(NaCI)` structure.
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