Q.

In A+B- ionic compound, radii of A+ and B- ions are 180 pm and 187 pm respectively. The crystal structure of this compound will be

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a

NaCl type

b

Similar to diamond

c

ZnS type

d

CsCl type

answer is D.

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Detailed Solution

r+/r−=180187=0.962 which lies in the range of 0.732−1.000 , hence co-ordination number: 8, i.e., the structure is CsCl type.
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In A+B- ionic compound, radii of A+ and B- ions are 180 pm and 187 pm respectively. The crystal structure of this compound will be