How many "equivalent" atoms belong to a single body-centered cubic unit cell?

Question

Quizplus · Accepted Answer

In a body-centered cubic (BCC) unit cell, there is one atom at each corner of the cube and one atom in the center. Each corner atom is shared among eight unit cells, contributing 1/8 of an atom per unit cell. Therefore, the eight corner atoms contribute a total of 1 atom (8 * 1/8), and the center atom contributes 1 whole atom, making a total of 2 equivalent atoms per BCC unit cell.

How Many "Equivalent" Atoms Belong to a Single Body-Centered Cubic