data_C
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.51
_cell_length_b   2.51
_cell_length_c   4.17
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   C
_chemical_formula_sum   C4
_cell_volume   22.67
_cell_formula_units_Z   4
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
  C  C0  1  0.0  0.45  0.26  1.0
  C  C1  1  0.0  0.45  0.82  1.0
  C  C2  1  0.25  0.72  0.35  1.0
  C  C3  1  0.25  0.72  0.91  1.0

data_C
_symmetry_space_group_name_H-M   P-1
_cell_length_a   2.51
_cell_length_b   2.51
_cell_length_c   4.17
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   2
_chemical_formula_structural   C
_chemical_formula_sum   C4
_cell_volume   22.67
_cell_formula_units_Z   4
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
  C  C0  2  0.13  0.64  0.26  1.0
  C  C1  2  0.13  0.64  0.82  1.0

C C C C