The crystal structure described by Ir4Ga8B crystallizes in the tetragonal I4_1/acd space group. There are two inequivalent Ir sites. In the first Ir site, Ir(1) is bonded in a 9-coordinate geometry to four equivalent Ga(1), four equivalent Ga(2), and one B(1) atom. In the second Ir site, Ir(2) is bonded in a 9-coordinate geometry to four equivalent Ga(1), four equivalent Ga(2), and one B(1) atom. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 4-coordinate geometry to two equivalent Ir(1) and two equivalent Ir(2) atoms. In the second Ga site, Ga(2) is bonded in a 4-coordinate geometry to two equivalent Ir(1) and two equivalent Ir(2) atoms. B(1) is bonded in a square co-planar geometry to two equivalent Ir(1) and two equivalent Ir(2) atoms. is represented by the CIF file [CIF]
data_Ga8BIr4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.265
_cell_length_b   12.265
_cell_length_c   12.265
_cell_angle_alpha   138.830
_cell_angle_beta   138.830
_cell_angle_gamma   59.633
_symmetry_Int_Tables_number   1
_cell_volume   791.573
_cell_formula_units_Z   4
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
  Ga  Ga0  1  0.151  0.875  0.153  1.0
  Ga  Ga1  1  0.501  0.777  0.153  1.0
  Ga  Ga2  1  0.625  0.349  0.847  1.0
  Ga  Ga3  1  0.099  0.751  0.224  1.0
  Ga  Ga4  1  0.527  0.875  0.776  1.0
  Ga  Ga5  1  0.625  0.973  0.224  1.0
  Ga  Ga6  1  0.749  0.401  0.776  1.0
  Ga  Ga7  1  0.723  0.999  0.847  1.0
  Ga  Ga8  1  0.599  0.375  0.347  1.0
  Ga  Ga9  1  0.249  0.473  0.347  1.0
  Ga  Ga10  1  0.125  0.901  0.653  1.0
  Ga  Ga11  1  0.651  0.499  0.276  1.0
  Ga  Ga12  1  0.251  0.032  0.651  1.0
  Ga  Ga13  1  0.782  0.631  0.281  1.0
  Ga  Ga14  1  0.350  0.501  0.719  1.0
  Ga  Ga15  1  0.999  0.150  0.281  1.0
  Ga  Ga16  1  0.869  0.718  0.719  1.0
  Ga  Ga17  1  0.900  0.119  0.651  1.0
  Ga  Ga18  1  0.468  0.249  0.349  1.0
  Ga  Ga19  1  0.381  0.600  0.349  1.0
  Ga  Ga20  1  0.499  0.218  0.849  1.0
  Ga  Ga21  1  0.968  0.619  0.219  1.0
  Ga  Ga22  1  0.400  0.749  0.781  1.0
  Ga  Ga23  1  0.751  0.100  0.219  1.0
  Ga  Ga24  1  0.881  0.532  0.781  1.0
  Ga  Ga25  1  0.850  0.131  0.849  1.0
  Ga  Ga26  1  0.282  0.001  0.151  1.0
  Ga  Ga27  1  0.369  0.650  0.151  1.0
  Ga  Ga28  1  0.027  0.251  0.653  1.0
  Ga  Ga29  1  0.001  0.849  0.724  1.0
  Ga  Ga30  1  0.125  0.277  0.276  1.0
  Ga  Ga31  1  0.223  0.375  0.724  1.0
  B  B32  1  0.500  0.000  0.500  1.0
  B  B33  1  0.750  0.750  0.000  1.0
  B  B34  1  0.250  0.250  0.000  1.0
  B  B35  1  0.000  0.500  0.500  1.0
  Ir  Ir36  1  0.648  0.648  0.000  1.0
  Ir  Ir37  1  0.398  0.898  0.500  1.0
  Ir  Ir38  1  0.602  0.102  0.500  1.0
  Ir  Ir39  1  0.852  0.852  0.000  1.0
  Ir  Ir40  1  0.102  0.602  0.500  1.0
  Ir  Ir41  1  0.352  0.352  0.000  1.0
  Ir  Ir42  1  0.148  0.148  0.000  1.0
  Ir  Ir43  1  0.898  0.398  0.500  1.0
  Ir  Ir44  1  0.074  0.426  0.000  1.0
  Ir  Ir45  1  0.176  0.676  0.851  1.0
  Ir  Ir46  1  0.824  0.324  0.149  1.0
  Ir  Ir47  1  0.426  0.074  0.000  1.0
  Ir  Ir48  1  0.676  0.824  0.500  1.0
  Ir  Ir49  1  0.574  0.574  0.649  1.0
  Ir  Ir50  1  0.926  0.926  0.351  1.0
  Ir  Ir51  1  0.324  0.176  0.500  1.0
[/CIF]
.
The crystal structure described by Ir4Ga8B crystallizes in the tetragonal I4_1/acd space group. There are two inequivalent Ir sites. In the first Ir site, Ir(1) is bonded in a 9-coordinate geometry to four equivalent Ga(1), four equivalent Ga(2), and one B(1) atom. In the second Ir site, Ir(2) is bonded in a 9-coordinate geometry to four equivalent Ga(1), four equivalent Ga(2), and one B(1) atom. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 4-coordinate geometry to two equivalent Ir(1) and two equivalent Ir(2) atoms. In the second Ga site, Ga(2) is bonded in a 4-coordinate geometry to two equivalent Ir(1) and two equivalent Ir(2) atoms. B(1) is bonded in a square co-planar geometry to two equivalent Ir(1) and two equivalent Ir(2) atoms. is represented by the CIF file [CIF]
data_Ga8BIr4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.265
_cell_length_b   12.265
_cell_length_c   12.265
_cell_angle_alpha   138.830
_cell_angle_beta   138.830
_cell_angle_gamma   59.633
_symmetry_Int_Tables_number   1
_cell_volume   791.573
_cell_formula_units_Z   4
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
  Ga  Ga0  1  0.151  0.875  0.153  1.0
  Ga  Ga1  1  0.501  0.777  0.153  1.0
  Ga  Ga2  1  0.625  0.349  0.847  1.0
  Ga  Ga3  1  0.099  0.751  0.224  1.0
  Ga  Ga4  1  0.527  0.875  0.776  1.0
  Ga  Ga5  1  0.625  0.973  0.224  1.0
  Ga  Ga6  1  0.749  0.401  0.776  1.0
  Ga  Ga7  1  0.723  0.999  0.847  1.0
  Ga  Ga8  1  0.599  0.375  0.347  1.0
  Ga  Ga9  1  0.249  0.473  0.347  1.0
  Ga  Ga10  1  0.125  0.901  0.653  1.0
  Ga  Ga11  1  0.651  0.499  0.276  1.0
  Ga  Ga12  1  0.251  0.032  0.651  1.0
  Ga  Ga13  1  0.782  0.631  0.281  1.0
  Ga  Ga14  1  0.350  0.501  0.719  1.0
  Ga  Ga15  1  0.999  0.150  0.281  1.0
  Ga  Ga16  1  0.869  0.718  0.719  1.0
  Ga  Ga17  1  0.900  0.119  0.651  1.0
  Ga  Ga18  1  0.468  0.249  0.349  1.0
  Ga  Ga19  1  0.381  0.600  0.349  1.0
  Ga  Ga20  1  0.499  0.218  0.849  1.0
  Ga  Ga21  1  0.968  0.619  0.219  1.0
  Ga  Ga22  1  0.400  0.749  0.781  1.0
  Ga  Ga23  1  0.751  0.100  0.219  1.0
  Ga  Ga24  1  0.881  0.532  0.781  1.0
  Ga  Ga25  1  0.850  0.131  0.849  1.0
  Ga  Ga26  1  0.282  0.001  0.151  1.0
  Ga  Ga27  1  0.369  0.650  0.151  1.0
  Ga  Ga28  1  0.027  0.251  0.653  1.0
  Ga  Ga29  1  0.001  0.849  0.724  1.0
  Ga  Ga30  1  0.125  0.277  0.276  1.0
  Ga  Ga31  1  0.223  0.375  0.724  1.0
  B  B32  1  0.500  0.000  0.500  1.0
  B  B33  1  0.750  0.750  0.000  1.0
  B  B34  1  0.250  0.250  0.000  1.0
  B  B35  1  0.000  0.500  0.500  1.0
  Ir  Ir36  1  0.648  0.648  0.000  1.0
  Ir  Ir37  1  0.398  0.898  0.500  1.0
  Ir  Ir38  1  0.602  0.102  0.500  1.0
  Ir  Ir39  1  0.852  0.852  0.000  1.0
  Ir  Ir40  1  0.102  0.602  0.500  1.0
  Ir  Ir41  1  0.352  0.352  0.000  1.0
  Ir  Ir42  1  0.148  0.148  0.000  1.0
  Ir  Ir43  1  0.898  0.398  0.500  1.0
  Ir  Ir44  1  0.074  0.426  0.000  1.0
  Ir  Ir45  1  0.176  0.676  0.851  1.0
  Ir  Ir46  1  0.824  0.324  0.149  1.0
  Ir  Ir47  1  0.426  0.074  0.000  1.0
  Ir  Ir48  1  0.676  0.824  0.500  1.0
  Ir  Ir49  1  0.574  0.574  0.649  1.0
  Ir  Ir50  1  0.926  0.926  0.351  1.0
  Ir  Ir51  1  0.324  0.176  0.500  1.0
[/CIF]
.