quantum-espresso/QHA/tetrahedra/ttrinp_bcc

  4  1  12
  0.000000  0.000000  0.000000
  0.500000  0.500000  0.500000
  0.500000  0.500000  0.000000
  1.000000  0.000000  0.000000
  1  2  3  4