$\textbf{k} = \frac{\pi}{a} \begin{bmatrix} d_x \\ d_y \\ d_z \end{bmatrix} $
$\textbf{k} \cdot \textbf{u}_\textbf{k} = $
123
$| \textbf{k} \times \textbf{u}_\textbf{k}| = $
456
$d_x$ :
0.1
-1
1
$d_y$ :
0.1
-1
1
$d_z$ :
0.1
-1
1
$u_{k_x}$:
0.5
-1
1
$u_{k_y}$:
0.5
-1
1
$u_{k_z}$:
0.5
-1
1