Chapter 11.4, Problem 1PPB

Interpretation Introduction

Interpretation:

The number of each ion are contained withina unit cell of $\text{CsCl}$ is to be determined.

Concept introduction:

The contribution of an atom varies according to the position of the atoms present. An atom at the corner contributes one-eighth and those on the faces contribute one-half. An atom at the body center contributes one. There are eight tetrahedral voids in a unit cell. The number of tetrahedral voids in a cell is actually twice the number of octahedral voids.