data_[Ag4Se2O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ag  1.9300  1.6000  1.0867
  Se  2.5500  1.1500  1.0133
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P-1]
_cell_length_a [6.0023]
_cell_length_b [6.4580]
_cell_length_c [7.0772]
_cell_angle_alpha [78.6342]
_cell_angle_beta [64.9086]
_cell_angle_gamma [62.3077]
_symmetry_Int_Tables_number [2]
_chemical_formula_structural [Ag2SeO4]
_chemical_formula_sum '[Ag4 Se2 O8]'
_cell_volume [219.9871]
_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
[
  Ag  Ag0  2  0.1803  0.1440  0.2427  1.0
  Ag  Ag1  2  0.4211  0.6440  0.7566  1.0
  Se  Se2  2  0.1343  0.2450  0.7451  1.0
  O  O3  2  0.1373  0.0703  0.5923  1.0
  O  O4  2  0.1870  0.5747  0.1018  1.0
  O  O5  2  0.2781  0.4242  0.6010  1.0
  O  O6  2  0.2865  0.0759  0.9050  1.0
]