data_[Rb2Sr2Ta2O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Sr  0.9500  2.0000  1.3200
  Ta  1.5000  1.4500  0.8200
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [6.4872]
_cell_length_b [6.4468]
_cell_length_c [7.7884]
_cell_angle_alpha [90.0000]
_cell_angle_beta [103.0330]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [RbSrTaO4]
_chemical_formula_sum '[Rb2 Sr2 Ta2 O8]'
_cell_volume [317.3324]
_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  0.3118  0.7500  0.0865  1.0
  Sr  Sr1  2  0.1932  0.7500  0.5535  1.0
  Ta  Ta2  2  0.2818  0.2500  0.3438  1.0
  O  O3  4  0.0943  0.0239  0.3259  1.0
  O  O4  2  0.4626  0.2500  0.5644  1.0
  O  O5  2  0.4665  0.2500  0.1901  1.0
]