data_[Rb2Tb2Be2O6]
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
  Be  1.5700  1.0500  0.5900
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [7.7123]
_cell_length_b [3.4226]
_cell_length_c [7.9349]
_cell_angle_alpha [90.0000]
_cell_angle_beta [108.9376]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [RbTbBeO3]
_chemical_formula_sum '[Rb2 Tb2 Be2 O6]'
_cell_volume [198.1143]
_cell_formula_units_Z [2]
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  2  0.2267  0.2500  0.1971  1.0
  Tb  Tb1  2  0.1642  0.2500  0.6610  1.0
  Be  Be2  2  0.3952  0.7500  0.9373  1.0
  O  O3  2  0.1452  0.7500  0.4655  1.0
  O  O4  2  0.1822  0.7500  0.8623  1.0
  O  O5  2  0.4653  0.2500  0.8669  1.0
]