Question

An element 'A' has BCC structure and another guest atom 'B', of largest possible size, are
present at the face centres , but without disturbing the original unit cell dimension. Determine
the packing fraction of this solid.

Answer 1

Answer :A unit cell is the smallest representation of an entire crystal. ... The hexagonal closest packed (hcp) has a coordination number of 12 and contains 6 atoms per unit cell. The face-centered cubic (fcc) has a coordination number of 12 and contains 4 atoms per unit cell.Both fcc and hcp unit cells does not have same packing pattern.

Answer 2

Answer:

31.6%

Explanation:

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