Question

Find the volume of the primitive unit cell in a crystal of Chromium.

Answer 1

Before attempting this question we need to know some basic informations about the element Chromium.

1. Chromium has body centered cubic (bcc) crystal structure.

2. Lattice constant of Chromium is 2.91Å.

Now we can solve the question. Here total number of atoms per unit cell is 2.(bcc strucure)

Volume of the primitive unit cell is half times a³.

ie volume = 1/2*(a³) where a is the lattice constant, a= 2.91Å.

Substituting the value of 'a' we get

Volume=12.32 ų.

Answer: 12.32 ų