data_[Ni2Ag2Se2O2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ni  1.9100  1.3500  0.7400
  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 [P6_3mc]
_cell_length_a [3.6706]
_cell_length_b [3.6706]
_cell_length_c [11.2626]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [186]
_chemical_formula_structural [NiAgSeO]
_chemical_formula_sum '[Ni2 Ag2 Se2 O2]'
_cell_volume [131.4137]
_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
[
  Ni  Ni0  2  0.0000  0.0000  0.4977  1
  Ag  Ag1  2  0.3333  0.6667  0.2562  1
  Se  Se2  2  0.3333  0.6667  0.5990  1
  O  O3  2  0.0000  0.0000  0.3347  1
]