data_[Rb2Tl2As2O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Tl  1.6200  1.9000  1.3325
  As  2.1800  1.1500  0.6600
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [6.1959]
_cell_length_b [6.1867]
_cell_length_c [7.6074]
_cell_angle_alpha [90.0000]
_cell_angle_beta [108.5461]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [RbTlAsO4]
_chemical_formula_sum '[Rb2 Tl2 As2 O8]'
_cell_volume [276.4624]
_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  0.3035  0.7500  0.0580  1.0
  Tl  Tl1  2  0.2090  0.7500  0.5258  1.0
  As  As2  2  0.2564  0.2500  0.3347  1.0
  O  O3  4  0.0725  0.0283  0.2898  1.0
  O  O4  2  0.4283  0.2500  0.1945  1.0
  O  O5  2  0.4328  0.2500  0.5607  1.0
]