data_[Rb8P4O14]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  P  2.1900  1.0000  0.5500
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [10.1560]
_cell_length_b [6.2511]
_cell_length_c [7.1893]
_cell_angle_alpha [90.0000]
_cell_angle_beta [104.4320]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Rb4P2O7]
_chemical_formula_sum '[Rb8 P4 O14]'
_cell_volume [442.0183]
_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  4  0.1749  0.5000  0.2045  1
  Rb  Rb1  2  0.0000  0.0000  0.0000  1
  Rb  Rb2  2  0.0000  0.0000  0.5000  1
  P  P3  4  0.1275  0.5000  0.6945  1
  O  O4  8  0.1063  0.2971  0.8032  1
  O  O5  4  0.2409  0.0000  0.3713  1
  O  O6  2  0.0000  0.5000  0.5000  1
]