data_[Rb2Ca2W2O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Ca  1.0000  1.8000  1.1400
  W  2.3600  1.3500  0.7667
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [6.3114]
_cell_length_b [6.4020]
_cell_length_c [7.6078]
_cell_angle_alpha [90.0000]
_cell_angle_beta [105.8837]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [RbCaWO4]
_chemical_formula_sum '[Rb2 Ca2 W2 O8]'
_cell_volume [295.6661]
_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  0.2717  0.2500  0.0464  1
  Ca  Ca1  2  0.1338  0.2500  0.5005  1
  W  W2  2  0.2861  0.7500  0.3260  1
  O  O3  4  0.0589  0.5434  0.3262  1
  O  O4  2  0.3737  0.7500  0.1161  1
  O  O5  2  0.4880  0.2500  0.4597  1
]