data_RuC2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.91
_cell_length_b   4.91
_cell_length_c   4.3
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   149.84
_symmetry_Int_Tables_number   1
_chemical_formula_structural   RuC2
_chemical_formula_sum   'Ru2 C4'
_cell_volume   52.15
_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
  Ru  Ru4  1  0.28  0.67  0.23  1.0
  Ru  Ru5  1  0.28  0.33  0.08  1.0
  C  C0  1  0.28  0.01  0.23  1.0
  C  C1  1  0.28  0.52  0.23  1.0
  C  C2  1  0.28  0.48  0.08  1.0
  C  C3  1  0.28  0.99  0.08  1.0

data_RuC2
_symmetry_space_group_name_H-M   P-1
_cell_length_a   2.56
_cell_length_b   4.3
_cell_length_c   4.91
_cell_angle_alpha   90.0
_cell_angle_beta   105.08
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   2
_chemical_formula_structural   RuC2
_chemical_formula_sum   'Ru2 C4'
_cell_volume   52.15
_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
  Ru  Ru0  2  0.33  0.58  0.83  1.0
  C  C1  2  0.01  0.42  0.51  1.0
  C  C2  2  0.48  0.58  0.98  1.0

Ru Ru C C C C