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Aluminium crystallizes in a cubic close ...

Aluminium crystallizes in a cubic close packed structure . Its metallic radius is 125 pm .
What is the length of the side of the unit cell .

Text Solution

Verified by Experts

Given radius = 125 pm
For a fcc lattice unit cell `r = (a)/(2sqrt2)`
` a = 2sqrt2 xx r`
`a= 2sqrt2 xx r`
`= 2 xx 1.414 xx 125`
`= 353 . 5` pm
`therefore` Length of the side of the unit cell = `353 . 5` pm .
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