data_[Co4Ni2Se12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Co  1.8800  1.3500  0.7683
  Ni  1.9100  1.3500  0.7400
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [P4_2/mnm]
_cell_length_a [5.5217]
_cell_length_b [5.5217]
_cell_length_c [11.0890]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [136]
_chemical_formula_structural [Co2NiSe6]
_chemical_formula_sum '[Co4 Ni2 Se12]'
_cell_volume [338.0909]
_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
[
  Co  Co0  4  0.0000  0.0000  0.1666  1
  Ni  Ni1  2  0.0000  0.0000  0.5000  1
  Se  Se2  8  0.1940  0.8060  0.3312  1
  Se  Se3  4  0.1912  0.8088  0.0000  1
]