Empty lattice approximation for a bcc crystal

$\vec{k}=u\vec{b}_1+v\vec{b}_2+w\vec{b}_3$ : $(u,v,w)$

  Symmetry points  (u,v,w)  [kx,ky,kz]
  Γ: (0,0,0)    [0,0,0]
  H: (-1/2,1/2,1/2)    [0,0,2π/a]  
  P: (1/4,1/4,1/4)    [π/a,π/a,π/a]  
  N: (0,1/2,0)    [0,π/a,π/a]  
\[ \begin{equation} \vec{b}_1=\frac{2\pi}{a}(\hat{k}_x+\hat{k}_y),\hspace{1cm} \vec{b}_2=\frac{2\pi}{a}(\hat{k}_y+\hat{k}_z),\hspace{1cm} \vec{b}_3=\frac{2\pi}{a}(\hat{k}_x+\hat{k}_x). \end{equation} \]