data_[Rb2Nb4W2O16]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Nb  1.6000  1.4500  0.8200
  W  2.3600  1.3500  0.7667
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [9.0569]
_cell_length_b [6.3096]
_cell_length_c [7.5021]
_cell_angle_alpha [90.0000]
_cell_angle_beta [107.8634]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [RbNb2WO8]
_chemical_formula_sum '[Rb2 Nb4 W2 O16]'
_cell_volume [408.0412]
_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
  Nb  Nb1  4  0.0606  0.5000  0.7222  1
  W  W2  2  0.0000  0.0000  0.0000  1
  O  O3  8  0.0192  0.2390  0.8198  1
  O  O4  4  0.1378  0.5000  0.5031  1
  O  O5  4  0.2179  0.0000  0.1167  1
]