data_[Na4Ir4C4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Ir  2.2000  1.3500  0.7650
  C  2.5500  0.7000  0.3000
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [9.7969]
_cell_length_b [3.7801]
_cell_length_c [5.2322]
_cell_angle_alpha [90.0000]
_cell_angle_beta [100.3983]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [NaIrC]
_chemical_formula_sum '[Na4 Ir4 C4]'
_cell_volume [190.5799]
_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
[
  Na  Na0  4  0.1185  0.5000  0.3728  1
  Ir  Ir1  4  0.1187  0.0000  0.9110  1
  C  C2  4  0.1746  0.5000  0.8934  1
]