data_HfC2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.75
_cell_length_b   6.75
_cell_length_c   2.89
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   153.3
_symmetry_Int_Tables_number   1
_chemical_formula_structural   HfC2
_chemical_formula_sum   'Hf2 C4'
_cell_volume   59.27
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Hf  Hf4  1  0.56  0.04  0.17  1.0
  Hf  Hf5  1  0.56  0.96  0.72  1.0
  C  C0  1  0.56  0.41  0.17  1.0
  C  C1  1  0.56  0.59  0.72  1.0
  C  C2  1  0.56  0.74  0.17  1.0
  C  C3  1  0.56  0.26  0.72  1.0

data_HfC2
_symmetry_space_group_name_H-M   P-1
_cell_length_a   2.89
_cell_length_b   3.12
_cell_length_c   6.75
_cell_angle_alpha   103.35
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   2
_chemical_formula_structural   HfC2
_chemical_formula_sum   'Hf2 C4'
_cell_volume   59.27
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-x, -y, -z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Hf  Hf0  2  0.28  0.04  0.54  1.0
  C  C1  2  0.28  0.41  0.91  1.0
  C  C2  2  0.28  0.74  0.24  1.0

Hf Hf C C C C