data_[Ti6Cu6Se6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ti  1.5400  1.4000  0.8517
  Cu  1.9000  1.3500  0.8200
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [R-3m]
_cell_length_a [3.6122]
_cell_length_b [3.6122]
_cell_length_c [31.3865]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [166]
_chemical_formula_structural [TiCuSe]
_chemical_formula_sum '[Ti6 Cu6 Se6]'
_cell_volume [354.6567]
_cell_formula_units_Z [6]
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
[
  Ti  Ti0  6  0.0000  0.0000  0.0971  1
  Cu  Cu1  6  0.0000  0.0000  0.1871  1
  Se  Se2  6  0.0000  0.0000  0.3856  1
]