Question

If the co-ordination number of an element in its crystal lattice is 8, then packing is :

• A. fcc
• B. hcp
• C. bcc
• D. none of the above

Answer 1

The correct option is C bcc

The co-ordination numbers of an element in fcc, hcp and bcc crystal lattice are $12$, $12$ and $8$ respectively. Hence, if the coordination number of an element in its crystal lattice is $8$, then packing is bcc.