Question

What is the edge length for cubic unit cell

Answer 1

The unit cell for the simple cubic structure contains one-eighth portions of eight corner atoms to make one complete atom, molecule or ion in each unit cell. Given the radius of the atom or ion the edge length is just; edge length (a) = 2r where r is the radius of the atom or ion.

Answer 2

Edge length for the cubic unit cell = 2r
R = radius of the atom.
And edge length is denoted by (a).
Hope dis helps