data_PtC2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.69
_cell_length_b   3.69
_cell_length_c   3.69
_cell_angle_alpha   124.06
_cell_angle_beta   118.22
_cell_angle_gamma   88.11
_symmetry_Int_Tables_number   1
_chemical_formula_structural   PtC2
_chemical_formula_sum   'Pt1 C2'
_cell_volume   34.66
_cell_formula_units_Z   1
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  Pt2  1  0.0  0.0  0.0  1.0
  C  C0  1  0.0  0.0  0.01  1.0
  C  C1  1  0.0  0.0  0.29  1.0

data_PtC2
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.46
_cell_length_b   3.69
_cell_length_c   3.69
_cell_angle_alpha   61.78
_cell_angle_beta   62.03
_cell_angle_gamma   62.03
_symmetry_Int_Tables_number   1
_chemical_formula_structural   PtC2
_chemical_formula_sum   'Pt1 C2'
_cell_volume   34.66
_cell_formula_units_Z   1
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  0.0  0.0  0.0  1.0
  C  C1  1  0.0  0.0  0.01  1.0
  C  C2  1  0.0  0.0  0.29  1.0

Pt C C