A unit cell of sodium chloride (face-centered cubic)consists of sodium and chloride ions. How many sodium ions are within this unit cell?

Question

Quizplus · Accepted Answer

In a face-centered cubic (FCC) unit cell of sodium chloride, there are 4 sodium ions. This is because each corner ion is shared by 8 unit cells and each face-centered ion is shared by 2 unit cells. The calculation is: 8 corners x 1/8 + 6 faces x 1/2 = 1 + 3 = 4 sodium ions.

A Unit Cell of Sodium Chloride (Face-Centered Cubic)consists of Sodium