data_[Nb4Ag4Se4O4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Nb  1.6000  1.4500  0.8200
  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 [P2_1/c]
_cell_length_a [7.7877]
_cell_length_b [5.9091]
_cell_length_c [5.6850]
_cell_angle_alpha [90.0000]
_cell_angle_beta [95.8603]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [14]
_chemical_formula_structural [NbAgSeO]
_chemical_formula_sum '[Nb4 Ag4 Se4 O4]'
_cell_volume [260.2442]
_cell_formula_units_Z [4]
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
[
  Nb  Nb0  4  0.0665  0.5248  0.2225  1
  Ag  Ag1  4  0.4134  0.1838  0.1003  1
  Se  Se2  4  0.2702  0.6121  0.8874  1
  O  O3  4  0.0617  0.2144  0.0163  1
]