a crystalline solid AB has NaCL type structure with the radius of B-ion is 250pm. which of the following cation can be made to slip into tetrahedral site of crystal of AB-
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Q+(radius=56pm)
AB as Nacl type structure-- F C C
Radius of B,RB=250 pm
radius ratio
RA+/RB- = 0.414
RA+ = 0.414×250
= 103.5 pm
P+, R+, and S+ have greater radius then 103.5 pm these are not able to slip.
Only Q+ (R=56pm) can made to slip tetrahedral site.
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