Problem VII.A |

In the case of C,
where the lattice constant (a)
was measured to be

- Calculate the distance between nearest
neighbors.

**Answer:**10.02 Å . - Given that the radius of
C is approximately3.53 Å , calculate the distance between spheres.

**Answer:**~2.96 Å .**Note: This compares to a distance of**3.35 Å between the planar sheets of carbon atoms in graphite.