data_FeIr
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.67
_cell_length_b   2.67
_cell_length_c   8.25
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   FeIr
_chemical_formula_sum   'Fe2 Ir2'
_cell_volume   50.85
_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
  Fe  Fe0  1  0.33  0.77  0.33  1.0
  Fe  Fe1  1  0.0  0.54  0.92  1.0
  Ir  Ir2  1  0.33  0.77  0.96  1.0
  Ir  Ir3  1  0.0  0.54  0.29  1.0

data_FeIr
_symmetry_space_group_name_H-M   P-1
_cell_length_a   2.67
_cell_length_b   2.67
_cell_length_c   8.25
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   2
_chemical_formula_structural   FeIr
_chemical_formula_sum   'Fe2 Ir2'
_cell_volume   50.85
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-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
  Fe  Fe0  2  0.17  0.61  0.21  1.0
  Ir  Ir1  2  0.17  0.61  0.84  1.0

Fe Fe Ir Ir
FeIr crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of two FeIr clusters. Fe(1) is bonded in a distorted single-bond geometry to one Ir(1) atom. The Fe(1)-Ir(1) bond length is 0.87 Å. Ir(1) is bonded in a distorted single-bond geometry to one Fe(1) atom.