data_[Cr6Ni18Ru3]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Cr  1.6600  1.4000  0.9400
  Ni  1.9100  1.3500  0.7400
  Ru  2.2000  1.3000  0.6610
]
_symmetry_space_group_name_H-M [R-3m]
_cell_length_a [6.9631]
_cell_length_b [6.9631]
_cell_length_c [7.2575]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [166]
_chemical_formula_structural [Cr2Ni6Ru]
_chemical_formula_sum '[Cr6 Ni18 Ru3]'
_cell_volume [304.7329]
_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
[
  Cr  Cr0  6  0.0000  0.0000  0.3388  1.0
  Ni  Ni1  18  0.0000  0.3323  0.5000  1.0
  Ru  Ru2  3  0.0000  0.0000  0.0000  1.0
]