kpoints for band structure  Γ-X-M-Γ
  15
line-mode
reciprocal
    0.0000000000     0.0000000000     0.0000000000    Γ
    0.0000000000     0.5000000000     0.0000000000    X 


    0.0000000000     0.5000000000     0.0000000000    X 
    0.5000000000     0.5000000000     0.0000000000    M 


    0.5000000000     0.5000000000     0.0000000000    M 
    0.0000000000     0.0000000000     0.0000000000    Γ