data_[Rb6Tb3B6O18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Tb  1.1000  1.7500  0.9815
  B  2.0400  0.8500  0.4100
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [R-3m]
_cell_length_a [5.5811]
_cell_length_b [5.5811]
_cell_length_c [19.3425]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [166]
_chemical_formula_structural [Rb2Tb(BO3)2]
_chemical_formula_sum '[Rb6 Tb3 B6 O18]'
_cell_volume [521.7689]
_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
[
  Rb  Rb0  6  0.0000  0.0000  0.2085  1.0
  Tb  Tb1  3  0.0000  0.0000  0.0000  1.0
  B  B2  6  0.0000  0.0000  0.4033  1.0
  O  O3  18  0.0473  0.5236  0.2629  1.0
]