data_[Ni2Ir6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ni  1.9100  1.3500  0.7400
  Ir  2.2000  1.3500  0.7650
]
_symmetry_space_group_name_H-M [Imm2]
_cell_length_a [2.7320]
_cell_length_b [8.6803]
_cell_length_c [4.6461]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [44]
_chemical_formula_structural [NiIr3]
_chemical_formula_sum '[Ni2 Ir6]'
_cell_volume [110.1817]
_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  0.5000  0.3304  1.0
  Ir  Ir1  4  0.0000  0.2487  0.9978  1.0
  Ir  Ir2  2  0.0000  0.0000  0.3376  1.0
]