The material described by IrBi4 crystallizes in the trigonal R-3m space group. There are two inequivalent Ir sites. In the first Ir site, Ir(1) is bonded in a 8-coordinate geometry to two equivalent Bi(1), two equivalent Bi(2), two equivalent Bi(3), and two equivalent Bi(4) atoms. In the second Ir site, Ir(2) is bonded in a body-centered cubic geometry to four equivalent Bi(1) and four equivalent Bi(2) atoms. There are four inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 2-coordinate geometry to one Ir(1) and one Ir(2) atom. In the second Bi site, Bi(2) is bonded in a distorted water-like geometry to one Ir(1) and one Ir(2) atom. In the third Bi site, Bi(3) is bonded in a water-like geometry to two equivalent Ir(1) atoms. In the fourth Bi site, Bi(4) is bonded in a distorted water-like geometry to two equivalent Ir(1) atoms. is represented by the CIF file [CIF]
data_Bi4Ir
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.555
_cell_length_b   15.353
_cell_length_c   15.353
_cell_angle_alpha   117.364
_cell_angle_beta   99.442
_cell_angle_gamma   99.442
_symmetry_Int_Tables_number   1
_cell_volume   1500.742
_cell_formula_units_Z   9
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
  Bi  Bi0  1  0.372  0.411  0.117  1.0
  Bi  Bi1  1  0.255  0.883  0.294  1.0
  Bi  Bi2  1  0.961  0.706  0.589  1.0
  Bi  Bi3  1  0.372  0.117  0.411  1.0
  Bi  Bi4  1  0.961  0.589  0.706  1.0
  Bi  Bi5  1  0.255  0.294  0.883  1.0
  Bi  Bi6  1  0.628  0.589  0.883  1.0
  Bi  Bi7  1  0.745  0.117  0.706  1.0
  Bi  Bi8  1  0.039  0.294  0.411  1.0
  Bi  Bi9  1  0.628  0.883  0.589  1.0
  Bi  Bi10  1  0.039  0.411  0.294  1.0
  Bi  Bi11  1  0.745  0.706  0.117  1.0
  Bi  Bi12  1  0.317  0.633  0.127  1.0
  Bi  Bi13  1  0.190  0.873  0.506  1.0
  Bi  Bi14  1  0.683  0.494  0.367  1.0
  Bi  Bi15  1  0.317  0.127  0.633  1.0
  Bi  Bi16  1  0.683  0.367  0.494  1.0
  Bi  Bi17  1  0.190  0.506  0.873  1.0
  Bi  Bi18  1  0.683  0.367  0.873  1.0
  Bi  Bi19  1  0.810  0.127  0.494  1.0
  Bi  Bi20  1  0.317  0.506  0.633  1.0
  Bi  Bi21  1  0.683  0.873  0.367  1.0
  Bi  Bi22  1  0.317  0.633  0.506  1.0
  Bi  Bi23  1  0.810  0.494  0.127  1.0
  Bi  Bi24  1  0.776  0.170  0.170  1.0
  Bi  Bi25  1  0.607  0.830  0.000  1.0
  Bi  Bi26  1  0.607  0.000  0.830  1.0
  Bi  Bi27  1  0.224  0.830  0.830  1.0
  Bi  Bi28  1  0.393  0.170  0.000  1.0
  Bi  Bi29  1  0.393  0.000  0.170  1.0
  Bi  Bi30  1  0.560  0.732  0.732  1.0
  Bi  Bi31  1  0.828  0.268  0.000  1.0
  Bi  Bi32  1  0.828  0.000  0.268  1.0
  Bi  Bi33  1  0.440  0.268  0.268  1.0
  Bi  Bi34  1  0.172  0.732  0.000  1.0
  Bi  Bi35  1  0.172  0.000  0.732  1.0
  Ir  Ir36  1  0.331  0.831  0.662  1.0
  Ir  Ir37  1  0.669  0.338  0.169  1.0
  Ir  Ir38  1  0.500  0.831  0.169  1.0
  Ir  Ir39  1  0.331  0.662  0.831  1.0
  Ir  Ir40  1  0.500  0.169  0.831  1.0
  Ir  Ir41  1  0.669  0.169  0.338  1.0
  Ir  Ir42  1  0.500  0.500  0.000  1.0
  Ir  Ir43  1  0.500  0.000  0.500  1.0
  Ir  Ir44  1  0.000  0.500  0.500  1.0
[/CIF]
.
The material described by IrBi4 crystallizes in the trigonal R-3m space group. There are two inequivalent Ir sites. In the first Ir site, Ir(1) is bonded in a 8-coordinate geometry to two equivalent Bi(1), two equivalent Bi(2), two equivalent Bi(3), and two equivalent Bi(4) atoms. In the second Ir site, Ir(2) is bonded in a body-centered cubic geometry to four equivalent Bi(1) and four equivalent Bi(2) atoms. There are four inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 2-coordinate geometry to one Ir(1) and one Ir(2) atom. In the second Bi site, Bi(2) is bonded in a distorted water-like geometry to one Ir(1) and one Ir(2) atom. In the third Bi site, Bi(3) is bonded in a water-like geometry to two equivalent Ir(1) atoms. In the fourth Bi site, Bi(4) is bonded in a distorted water-like geometry to two equivalent Ir(1) atoms. is represented by the CIF file [CIF]
data_Bi4Ir
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.555
_cell_length_b   15.353
_cell_length_c   15.353
_cell_angle_alpha   117.364
_cell_angle_beta   99.442
_cell_angle_gamma   99.442
_symmetry_Int_Tables_number   1
_cell_volume   1500.742
_cell_formula_units_Z   9
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
  Bi  Bi0  1  0.372  0.411  0.117  1.0
  Bi  Bi1  1  0.255  0.883  0.294  1.0
  Bi  Bi2  1  0.961  0.706  0.589  1.0
  Bi  Bi3  1  0.372  0.117  0.411  1.0
  Bi  Bi4  1  0.961  0.589  0.706  1.0
  Bi  Bi5  1  0.255  0.294  0.883  1.0
  Bi  Bi6  1  0.628  0.589  0.883  1.0
  Bi  Bi7  1  0.745  0.117  0.706  1.0
  Bi  Bi8  1  0.039  0.294  0.411  1.0
  Bi  Bi9  1  0.628  0.883  0.589  1.0
  Bi  Bi10  1  0.039  0.411  0.294  1.0
  Bi  Bi11  1  0.745  0.706  0.117  1.0
  Bi  Bi12  1  0.317  0.633  0.127  1.0
  Bi  Bi13  1  0.190  0.873  0.506  1.0
  Bi  Bi14  1  0.683  0.494  0.367  1.0
  Bi  Bi15  1  0.317  0.127  0.633  1.0
  Bi  Bi16  1  0.683  0.367  0.494  1.0
  Bi  Bi17  1  0.190  0.506  0.873  1.0
  Bi  Bi18  1  0.683  0.367  0.873  1.0
  Bi  Bi19  1  0.810  0.127  0.494  1.0
  Bi  Bi20  1  0.317  0.506  0.633  1.0
  Bi  Bi21  1  0.683  0.873  0.367  1.0
  Bi  Bi22  1  0.317  0.633  0.506  1.0
  Bi  Bi23  1  0.810  0.494  0.127  1.0
  Bi  Bi24  1  0.776  0.170  0.170  1.0
  Bi  Bi25  1  0.607  0.830  0.000  1.0
  Bi  Bi26  1  0.607  0.000  0.830  1.0
  Bi  Bi27  1  0.224  0.830  0.830  1.0
  Bi  Bi28  1  0.393  0.170  0.000  1.0
  Bi  Bi29  1  0.393  0.000  0.170  1.0
  Bi  Bi30  1  0.560  0.732  0.732  1.0
  Bi  Bi31  1  0.828  0.268  0.000  1.0
  Bi  Bi32  1  0.828  0.000  0.268  1.0
  Bi  Bi33  1  0.440  0.268  0.268  1.0
  Bi  Bi34  1  0.172  0.732  0.000  1.0
  Bi  Bi35  1  0.172  0.000  0.732  1.0
  Ir  Ir36  1  0.331  0.831  0.662  1.0
  Ir  Ir37  1  0.669  0.338  0.169  1.0
  Ir  Ir38  1  0.500  0.831  0.169  1.0
  Ir  Ir39  1  0.331  0.662  0.831  1.0
  Ir  Ir40  1  0.500  0.169  0.831  1.0
  Ir  Ir41  1  0.669  0.169  0.338  1.0
  Ir  Ir42  1  0.500  0.500  0.000  1.0
  Ir  Ir43  1  0.500  0.000  0.500  1.0
  Ir  Ir44  1  0.000  0.500  0.500  1.0
[/CIF]
.