Chapter 12.5, Problem 1RC

Interpretation Introduction

Interpretation:

The number ${\text{Zn}}^{\text{2+}}$ and ${\text{O}}^{\text{2-}}$ ions that are present in the given unit cell of zinc oxide, has to be determined and also the formula of zinc oxide has to be given

Concept Introduction:

In the given figure visibly shows that there are 6 faces, 8 corners and 4 edges. So, the unit cell shown is identified as FCC unit cell of zinc oxide.

In the FCC-Face centered cubic unit cell:

Each corner atom is shared by 8 unit cells.

Each $\text{face-centered}$ atom is shared by 2 unit cells.

Each $\text{edge}$ atom is shared by 4 unit cells.