data_PtC2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.02
_cell_length_b   8.02
_cell_length_c   2.55
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   160.52
_symmetry_Int_Tables_number   1
_chemical_formula_structural   PtC2
_chemical_formula_sum   'Pt2 C4'
_cell_volume   54.69
_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
  Pt  Pt4  1  0.36  0.75  0.27  1.0
  Pt  Pt5  1  0.36  0.25  0.27  1.0
  C  C0  1  0.36  0.0  0.27  1.0
  C  C1  1  0.0  0.0  0.0  1.0
  C  C2  1  0.36  0.32  0.0  1.0
  C  C3  1  0.36  0.68  0.0  1.0

data_PtC2
_symmetry_space_group_name_H-M   P1
_cell_length_a   2.55
_cell_length_b   2.72
_cell_length_c   8.02
_cell_angle_alpha   99.74
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   PtC2
_chemical_formula_sum   'Pt2 C4'
_cell_volume   54.69
_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
  Pt  Pt0  1  0.27  0.25  0.61  1.0
  Pt  Pt1  1  0.27  0.75  0.11  1.0
  C  C2  1  -0.0  0.68  0.04  1.0
  C  C3  1  -0.0  0.32  0.67  1.0
  C  C4  1  0.0  0.0  0.0  1.0
  C  C5  1  0.27  0.0  0.36  1.0

Pt Pt C C C C
Pt Pt C C C C 0 5 o o o 0 2 o + o 1 4 o o o 1 2 o o o 3 4 o o o 