The material structure described by IrSi3 is Sodium arsenide structured and crystallizes in the hexagonal P6_3/mmc space group. Ir(1) is bonded in a 11-coordinate geometry to three equivalent Si(2) and eight equivalent Si(1) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 1-coordinate geometry to four equivalent Ir(1) atoms. In the second Si site, Si(2) is bonded in a trigonal planar geometry to three equivalent Ir(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Si3Ir
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.379
_cell_length_b   4.379
_cell_length_c   7.405
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   122.988
_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
  Si  Si0  1  0.333  0.667  0.915  1.0
  Si  Si1  1  0.667  0.333  0.415  1.0
  Si  Si2  1  0.000  0.000  0.250  1.0
  Si  Si3  1  0.000  0.000  0.750  1.0
  Si  Si4  1  0.333  0.667  0.585  1.0
  Si  Si5  1  0.667  0.333  0.085  1.0
  Ir  Ir6  1  0.667  0.333  0.750  1.0
  Ir  Ir7  1  0.333  0.667  0.250  1.0
[/CIF]
.
The material structure described by IrSi3 is Sodium arsenide structured and crystallizes in the hexagonal P6_3/mmc space group. Ir(1) is bonded in a 11-coordinate geometry to three equivalent Si(2) and eight equivalent Si(1) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 1-coordinate geometry to four equivalent Ir(1) atoms. In the second Si site, Si(2) is bonded in a trigonal planar geometry to three equivalent Ir(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Si3Ir
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.379
_cell_length_b   4.379
_cell_length_c   7.405
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   122.988
_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
  Si  Si0  1  0.333  0.667  0.915  1.0
  Si  Si1  1  0.667  0.333  0.415  1.0
  Si  Si2  1  0.000  0.000  0.250  1.0
  Si  Si3  1  0.000  0.000  0.750  1.0
  Si  Si4  1  0.333  0.667  0.585  1.0
  Si  Si5  1  0.667  0.333  0.085  1.0
  Ir  Ir6  1  0.667  0.333  0.750  1.0
  Ir  Ir7  1  0.333  0.667  0.250  1.0
[/CIF]
.