data_[Ca3Ac3Tb6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ca  1.0000  1.8000  1.1400
  Ac  1.1000  1.9500  1.2600
  Tb  1.1000  1.7500  0.9815
]
_symmetry_space_group_name_H-M [R3m]
_cell_length_a [3.7431]
_cell_length_b [3.7431]
_cell_length_c [36.4730]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [160]
_chemical_formula_structural [CaAcTb2]
_chemical_formula_sum '[Ca3 Ac3 Tb6]'
_cell_volume [442.5595]
_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
[
  Ca  Ca0  3  0.0000  0.0000  0.5004  1
  Tb  Tb1  3  0.0000  0.0000  0.0820  1
  Tb  Tb2  3  0.0000  0.0000  0.2512  1
  Ac  Ac3  3  0.0000  0.0000  0.6663  1
]