The side length of diamond unit cell is (in pm):
In diamond, carbon atom occupy FCC lattice points as well as alternate tetrahedral voids. If edge length of the unit cell is 356 pm, then radius of carbon atom is
First order X-ray reflection (λ = 154 pm) is maximum from a set of (2, 0, 0) planes of a B.C.C lattice was observed at 16∘, 6’. Then, the edge length of unit cell is