data_[K2P2H4Se2O6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  P  2.1900  1.0000  0.5500
  H  2.2000  0.2500  0.0000
  Se  2.5500  1.1500  1.0133
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Cm]
_cell_length_a [6.6808]
_cell_length_b [6.4358]
_cell_length_c [6.2351]
_cell_angle_alpha [90.0000]
_cell_angle_beta [109.1772]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [8]
_chemical_formula_structural [KPH2SeO3]
_chemical_formula_sum '[K2 P2 H4 Se2 O6]'
_cell_volume [253.2066]
_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
[
  K  K0  2  0.3403  0.5000  0.6114  1.0
  P  P1  2  0.3440  0.0000  0.1156  1.0
  H  H2  4  0.0195  0.1926  0.1908  1.0
  Se  Se3  2  0.3822  0.0000  0.7864  1.0
  O  O4  4  0.4587  0.1931  0.2681  1.0
  O  O5  2  0.1114  0.0000  0.1107  1.0
]