A compound AB has an NaCl like structure. The radius of A+ and B− is 1.14∘A and 1.86∘A. What is the minimum distance between two A+ ions in angstroms? (Take √2= 1.41)
Open in App
Solution
The edge length is given by the expression, a=2(r++r−)
= 2(1.14+1.86)
= 6 ∘A
The minimum distance between two cations is given by a√2
Substituting, 6√2 = 3×√2 = 4.23 ∘A