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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……….
(A) NaCl type
(B) CsCl type
(C) ZnS type
(D) B2O3 type
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……….
(A) NaCl type
(B) CsCl type
(C) ZnS type
(D) B2O3 type
Correct Answer – B
`r_(+)//r_(-)=(180)/(187)=0.962` which lies in the range of
`0.732-1.000`, hence co-ordination number = 8 i.e. the structure is CsCl type .