data_[Ac6Cu3C3]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ac  1.1000  1.9500  1.2600
  Cu  1.9000  1.3500  0.8200
  C  2.5500  0.7000  0.3000
]
_symmetry_space_group_name_H-M [R-3m]
_cell_length_a [3.9872]
_cell_length_b [3.9872]
_cell_length_c [22.9228]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [166]
_chemical_formula_structural [Ac2CuC]
_chemical_formula_sum '[Ac6 Cu3 C3]'
_cell_volume [315.6055]
_cell_formula_units_Z [3]
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
[
  Ac  Ac0  6  0.0000  0.0000  0.2656  1
  Cu  Cu1  3  -0.0000  -0.0000  0.5000  1
  C  C2  3  0.0000  0.0000  0.0000  1
]