data_[Na3Tb6Tc3O18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Tb  1.1000  1.7500  0.9815
  Tc  1.9000  1.3500  0.7417
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [R3]
_cell_length_a [5.6518]
_cell_length_b [5.6518]
_cell_length_c [14.9699]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [146]
_chemical_formula_structural [NaTb2TcO6]
_chemical_formula_sum '[Na3 Tb6 Tc3 O18]'
_cell_volume [414.1120]
_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
[
  Na  Na0  3  0.0000  0.0000  0.1985  1
  Tb  Tb1  3  0.0000  0.0000  0.4730  1
  Tb  Tb2  3  0.0000  0.0000  0.9801  1
  Tc  Tc3  3  0.0000  0.0000  0.6780  1
  O  O4  9  0.0052  0.7306  0.5911  1
  O  O5  9  0.0170  0.3786  0.4118  1
]