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Vanderwaal Radius

if the radius...

Question

if the radius of Br- ion is 0.182nm how large cation can fit in each tetra hederal hole

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Solution

$R a d i u s r a t i o \frac{r^{+}}{r^{-}} = 0.225 f o r t e t r a h e d r a l h o l e r^{+} = 0.225 \times r^{-} r^{+} = 0.225 \times 0.182 = 0.04095 n m R a d i u s o f c a t i o n t h a t c a n f i t i n t o t e t r a h e d r a l h o l e = 40.95 p m$

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