Chapter 11, Problem 11.78QE

Interpretation Introduction

Interpretation:

The number of atoms present in the unit cell and cubic unit cell in which chromium crystallize has to be found.

Concept Introduction:

A unit cell is the smallest representation of an entire crystal.  All crystal lattices are built of repeating unit cells.  In a unit cell, an atom's coordination number is the number of atoms it is touching.  The face-centered cubic (fcc) has a coordination number of 12 and contains 4 atoms per unit cell.  The body-centered cubic (bcc) has a coordination number of 8 and contains 2 atoms per unit cell.  The simple cubic has a coordination number of 6 and contains 1 atom per unit cell.