data_[Rb2Ta4Ti2O16]
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
  Ti  1.5400  1.4000  0.8517
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [9.4015]
_cell_length_b [6.0598]
_cell_length_c [7.6767]
_cell_angle_alpha [90.0000]
_cell_angle_beta [109.1787]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [RbTa2TiO8]
_chemical_formula_sum '[Rb2 Ta4 Ti2 O16]'
_cell_volume [413.0813]
_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  0.0000  0.5000  1
  Ta  Ta1  4  0.0794  0.5000  0.7514  1
  Ti  Ti2  2  0.0000  0.0000  0.0000  1
  O  O3  8  0.0137  0.2361  0.8259  1
  O  O4  4  0.1160  0.5000  0.5116  1
  O  O5  4  0.2175  0.0000  0.1126  1
]