data_[Rb2Ta2B4O12]
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
  B  2.0400  0.8500  0.4100
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Pmn2_1]
_cell_length_a [7.5780]
_cell_length_b [3.9375]
_cell_length_c [9.8716]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [31]
_chemical_formula_structural [RbTa(BO3)2]
_chemical_formula_sum '[Rb2 Ta2 B4 O12]'
_cell_volume [294.5515]
_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  0.0000  0.5656  0.6084  1.0
  Ta  Ta1  2  0.0000  0.9074  0.0025  1.0
  B  B2  4  0.1644  0.0102  0.2899  1.0
  O  O3  4  0.1799  0.9420  0.1551  1.0
  O  O4  4  0.1896  0.9352  0.8670  1.0
  O  O5  2  0.0000  0.0320  0.3558  1.0
  O  O6  2  0.0000  0.4313  0.0021  1.0
]