data_SrReIr2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.86
_cell_length_b   4.86
_cell_length_c   4.86
_cell_angle_alpha   126.89
_cell_angle_beta   126.89
_cell_angle_gamma   78.44
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SrReIr2
_chemical_formula_sum   'Sr1 Re1 Ir2'
_cell_volume   71.16
_cell_formula_units_Z   1
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
  Sr  Sr3  1  0.0  0.0  0.0  1.0
  Re  Re2  1  0.0  0.0  0.77  1.0
  Ir  Ir0  1  0.17  0.0  0.88  1.0
  Ir  Ir1  1  0.0  0.17  0.88  1.0

data_SrReIr2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.15
_cell_length_b   6.15
_cell_length_c   4.86
_cell_angle_alpha   90.0
_cell_angle_beta   129.22
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   SrReIr2
_chemical_formula_sum   'Sr2 Re2 Ir4'
_cell_volume   142.31
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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
  Sr  Sr0  2  0.0  0.0  0.0  1.0
  Re  Re1  2  0.23  0.0  0.23  1.0
  Ir  Ir2  4  0.2  0.09  0.29  1.0

Sr Re Ir Ir
Sr Re Ir Ir 0 3 o o - 0 2 o o - 0 1 o o - 1 3 o o o 1 2 o o o 
SrReIr2 is Copper structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two SrReIr2 clusters. Sr(1) is bonded in a 3-coordinate geometry to one Re(1) and two equivalent Ir(1) atoms. The Sr(1)-Re(1) bond length is 1.14 Å. Both Sr(1)-Ir(1) bond lengths are 1.27 Å. Re(1) is bonded in a distorted water-like geometry to one Sr(1) and two equivalent Ir(1) atoms. Both Re(1)-Ir(1) bond lengths are 0.68 Å. Ir(1) is bonded in a distorted single-bond geometry to one Sr(1) and one Re(1) atom.