Question

What are the characteristics of BCC (Body-Centered Cubic) structure in terms of atoms per cell and coordination number?

1) Atoms per cell: 2, Coordination number: 8
2) Atoms per cell: 1, Coordination number: 6
3) Atoms per cell: 4, Coordination number: 12
4) Atoms per cell: 8, Coordination number: 14

Answer 1

In a Body-Centered Cubic (BCC) structure, there are 2 atoms per cell and the coordination number is 8.

Step-by-step explanation:

The characteristics of a Body-Centered Cubic (BCC) structure can be described in terms of atoms per cell and the coordination number. In a BCC structure, metal atoms occupy the eight corners of a cube and one atom in the center. This results in a total of two atoms per cell: one-eighth of an atom at each of the eight corners adds up to one atom, and the one atom in the very center equals another atom. The coordination number, which is the number of nearest neighbor atoms to which a central atom is equally spaced, is 8 in a BCC structure. Each atom touches four atoms in the layer above and four in the layer below it.