Chapter 11, Problem 11.72QE

Interpretation Introduction

Interpretation:

The number of fluoride ion in FCC array has to be given.

Concept Introduction:

In this crystal structure there are the eight lattice points at each corner as in the simple cubic but there are additional lattice points at the center of each face of the cube.

  $\text{FCC=}\frac{\text{Total}\text{Number}\text{of}\text{edges}}{\text{Number}\text{of}\text{atoms}\text{share}}\text{+}\frac{\text{Number}\text{of}\text{corners}}{\text{Number}\text{of}\text{atoms}\text{shared}}$