data_ReIr2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.2
_cell_length_b   5.2
_cell_length_c   6.53
_cell_angle_alpha   103.44
_cell_angle_beta   103.44
_cell_angle_gamma   30.81
_symmetry_Int_Tables_number   1
_chemical_formula_structural   ReIr2
_chemical_formula_sum   'Re2 Ir4'
_cell_volume   87.71
_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
  Re  Re4  1  0.44  0.0  0.22  1.0
  Re  Re5  1  0.02  0.0  0.11  1.0
  Ir  Ir0  1  0.76  0.0  0.48  1.0
  Ir  Ir1  1  0.69  0.0  0.85  1.0
  Ir  Ir2  1  0.92  0.0  0.0  1.0
  Ir  Ir3  1  0.53  0.0  0.33  1.0

data_ReIr2
_symmetry_space_group_name_H-M   P-1
_cell_length_a   2.76
_cell_length_b   5.2
_cell_length_c   6.53
_cell_angle_alpha   103.44
_cell_angle_beta   90.0
_cell_angle_gamma   105.41
_symmetry_Int_Tables_number   2
_chemical_formula_structural   ReIr2
_chemical_formula_sum   'Re2 Ir4'
_cell_volume   87.71
_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
  Re  Re0  2  0.0  0.29  0.45  1.0
  Ir  Ir1  2  0.0  0.03  0.81  1.0
  Ir  Ir2  2  0.0  0.19  0.34  1.0

Re Re Ir Ir Ir Ir
ReIr2 crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of two ReIr2 clusters. Re(1) is bonded in a single-bond geometry to one Ir(2) atom. The Re(1)-Ir(2) bond length is 0.78 Å. There are two inequivalent Ir sites. In the first Ir site, Ir(1) is bonded in a distorted single-bond geometry to one Ir(2) atom. The Ir(1)-Ir(2) bond length is 1.33 Å. In the second Ir site, Ir(2) is bonded in a distorted single-bond geometry to one Re(1) and one Ir(1) atom.