data_[Rb12Ta4O16]
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 [Pnma]
_cell_length_a [8.5149]
_cell_length_b [8.9909]
_cell_length_c [9.6067]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [62]
_chemical_formula_structural [Rb3TaO4]
_chemical_formula_sum '[Rb12 Ta4 O16]'
_cell_volume [735.4548]
_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
[
  Rb  Rb0  8  0.0351  0.5164  0.2621  1
  Rb  Rb1  4  0.1927  0.2500  0.9953  1
  Ta  Ta2  4  0.2197  0.2500  0.5091  1
  O  O3  8  0.1787  0.5772  0.9477  1
  O  O4  4  0.0134  0.2500  0.4408  1
  O  O5  4  0.2165  0.2500  0.7051  1
]