Determine the values for aluminum and tungsten

Question

Discuss the below in detail :

Q: For both FCC and BCC crystal structures, the Burger's vector b may be expressed as

b=a[hkl]/2

where a is the unit cell length and [hkl] is the crystallographic direction having the greatest linear atomic density.

(a) What are the Burger's vector representations for FCC, BCC, and SC structures?

(b) If the magnitude of the Burger's vector |b| is

|b|=d/2(h²+k²+l²)^1/2

Determine the values of |b| for aluminum and tungsten.