How many "equivalent" atoms belong to a single face-centered cube unit cell?

Question

Quizplus · Accepted Answer

In a face-centered cubic (FCC) unit cell, there are 4 "equivalent" atoms per unit cell. This includes the atoms at the corners of the cube (each of which is shared among eight unit cells and thus counts as 1/8 of an atom per cell) and the atoms on the faces of the cube (each of which is shared between two cells and thus counts as 1/2 of an atom per cell). There are 8 corners contributing a total of 1 atom (8 * 1/8) and 6 face-centered atoms contributing a total of 3 atoms (6 * 1/2), summing up to 4 atoms per unit cell.

How Many "Equivalent" Atoms Belong to a Single Face-Centered Cube