data_[Na8Tb4O12]
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
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [6.0339]
_cell_length_b [10.1549]
_cell_length_c [5.9168]
_cell_angle_alpha [90.0000]
_cell_angle_beta [111.3767]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [Na2TbO3]
_chemical_formula_sum '[Na8 Tb4 O12]'
_cell_volume [337.6059]
_cell_formula_units_Z [4]
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  4  0.0000  0.0804  0.2500  1.0
  Na  Na1  4  0.0000  0.2457  0.7500  1.0
  Tb  Tb2  4  0.0000  0.4055  0.2500  1.0
  O  O3  8  0.2149  0.4299  0.0078  1.0
  O  O4  4  0.2500  0.2500  0.5000  1.0
]