Automatically generated mesh
       4
Reciprocal lattice
    0.00000000000000    0.00000000000000    0.00000000000000             1
    0.33333333333334    0.00000000000000   -0.00000000000000             2
    0.00000000000000    0.00000000000000    0.50000000000000             1
    0.33333333333334    0.00000000000000    0.50000000000000             2