data_[Rb1Sm1Ta2O7]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Sm  1.1700  1.8500  1.2290
  Ta  1.5000  1.4500  0.8200
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P4/mmm]
_cell_length_a [3.8939]
_cell_length_b [3.8939]
_cell_length_c [11.3052]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [123]
_chemical_formula_structural [RbSmTa2O7]
_chemical_formula_sum '[Rb1 Sm1 Ta2 O7]'
_cell_volume [171.4135]
_cell_formula_units_Z [1]
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  1  0.5000  0.5000  0.5000  1.0
  Sm  Sm1  1  0.5000  0.5000  0.0000  1.0
  Ta  Ta2  2  0.0000  0.0000  0.1980  1.0
  O  O3  4  0.0000  0.5000  0.1583  1.0
  O  O4  2  0.0000  0.0000  0.3580  1.0
  O  O5  1  0.0000  0.0000  0.0000  1.0
]