data_[K4Ni2Se4O12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Ni  1.9100  1.3500  0.7400
  Se  2.5500  1.1500  1.0133
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [12.9112]
_cell_length_b [5.3807]
_cell_length_c [7.4770]
_cell_angle_alpha [90.0000]
_cell_angle_beta [121.4121]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [K2Ni(SeO3)2]
_chemical_formula_sum '[K4 Ni2 Se4 O12]'
_cell_volume [443.3136]
_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  4  0.2197  0.5000  0.2412  1
  Ni  Ni1  2  0.0000  0.5000  0.5000  1
  Se  Se2  4  0.0289  0.0000  0.2472  1
  O  O3  8  0.0831  0.2546  0.4183  1
  O  O4  4  0.1240  0.0000  0.8797  1
]