data_[Rb4P2O8]
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 [P2_1/m]
_cell_length_a [6.2158]
_cell_length_b [6.2415]
_cell_length_c [8.2264]
_cell_angle_alpha [90.0000]
_cell_angle_beta [102.8041]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [Rb2PO4]
_chemical_formula_sum '[Rb4 P2 O8]'
_cell_volume [311.2117]
_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  0.2238  0.2500  0.4662  1.0
  Rb  Rb1  2  0.2911  0.2500  0.9793  1.0
  P  P2  2  0.2735  0.7500  0.2249  1.0
  O  O3  4  0.4179  0.5458  0.2671  1.0
  O  O4  2  0.0849  0.7500  0.3198  1.0
  O  O5  2  0.1839  0.7500  0.0316  1.0
]