data_[Rb6Ta2O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Ta  1.5000  1.4500  0.8200
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [I-42m]
_cell_length_a [6.0003]
_cell_length_b [6.0003]
_cell_length_c [11.2089]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [121]
_chemical_formula_structural [Rb3TaO4]
_chemical_formula_sum '[Rb6 Ta2 O8]'
_cell_volume [403.5665]
_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  4  0.0000  0.5000  0.2500  1.0
  Rb  Rb1  2  0.0000  0.0000  0.5000  1.0
  Ta  Ta2  2  0.0000  0.0000  0.0000  1.0
  O  O3  8  0.1815  0.1815  0.9039  1.0
]