data_[Rb2Ta2As4O16]
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
  As  2.1800  1.1500  0.6600
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [8.9334]
_cell_length_b [5.5235]
_cell_length_c [8.7135]
_cell_angle_alpha [90.0000]
_cell_angle_beta [93.0743]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [RbTa(AsO4)2]
_chemical_formula_sum '[Rb2 Ta2 As4 O16]'
_cell_volume [429.3360]
_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  0.0000  1.0
  Ta  Ta1  2  0.0000  0.0000  0.5000  1.0
  As  As2  4  0.1407  0.5000  0.2980  1.0
  O  O3  8  0.0314  0.2509  0.3402  1.0
  O  O4  4  0.1888  0.5000  0.1172  1.0
  O  O5  4  0.2141  0.0000  0.5612  1.0
]