Ncert Exercises & Solutions

The edge lengths of the unit cells in terms of the radius of spheres constituting fcc, bcc, and simple cubic unit cells are respectively -

1. $2 \sqrt{2 r}, \frac{4 r}{\sqrt{3}}, 2 r$

2. $\frac{4 r}{\sqrt{3}}, 2 \sqrt{2 r}, 2 r$