Chapter 12, Problem 12.66QP

(a)

Interpretation Introduction

Interpretation: The differences between the sphalerite and rock salt structure of $\text{ZnS}$ are to be stated. The consistency of both the structure with the observed stoichiometry of $\text{ZnS}$ is to be explained.

Concept introduction: In the unit cell of mineral sphalerite, the arrangement of ${\text{S}}^{2-}$ anions is fcc and half of the eight tetrahedral holes inside the cell are occupied by ${\text{Zn}}^{2+}$ cations.

To determine: The differences between the sphalerite and rock salt structure of $\text{ZnS}$.

(b)

Interpretation Introduction

To determine: An explanation for the consistency of both the structure with the observed stoichiometry of $\text{ZnS}$.