The compound described by Ir3Si crystallizes in the tetragonal I4/mcm space group. There are two inequivalent Ir sites. In the first Ir site, Ir(1) is bonded in a distorted square co-planar geometry to four equivalent Si(1) atoms. In the second Ir site, Ir(2) is bonded in a distorted water-like geometry to two equivalent Si(1) atoms. Si(1) is bonded in a 8-coordinate geometry to four equivalent Ir(1) and four equivalent Ir(2) atoms. is represented by the CIF card [CIF]
data_SiIr3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.254
_cell_length_b   5.254
_cell_length_c   5.456
_cell_angle_alpha   118.783
_cell_angle_beta   118.783
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   110.299
_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  0.250  0.750  0.500  1.0
  Si  Si1  1  0.750  0.250  0.500  1.0
  Ir  Ir2  1  0.250  0.250  0.500  1.0
  Ir  Ir3  1  0.750  0.750  0.500  1.0
  Ir  Ir4  1  0.184  0.684  0.000  1.0
  Ir  Ir5  1  0.316  0.184  0.000  1.0
  Ir  Ir6  1  0.684  0.816  0.000  1.0
  Ir  Ir7  1  0.816  0.316  0.000  1.0
[/CIF]
.
The compound described by Ir3Si crystallizes in the tetragonal I4/mcm space group. There are two inequivalent Ir sites. In the first Ir site, Ir(1) is bonded in a distorted square co-planar geometry to four equivalent Si(1) atoms. In the second Ir site, Ir(2) is bonded in a distorted water-like geometry to two equivalent Si(1) atoms. Si(1) is bonded in a 8-coordinate geometry to four equivalent Ir(1) and four equivalent Ir(2) atoms. is represented by the CIF card [CIF]
data_SiIr3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.254
_cell_length_b   5.254
_cell_length_c   5.456
_cell_angle_alpha   118.783
_cell_angle_beta   118.783
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   110.299
_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  0.250  0.750  0.500  1.0
  Si  Si1  1  0.750  0.250  0.500  1.0
  Ir  Ir2  1  0.250  0.250  0.500  1.0
  Ir  Ir3  1  0.750  0.750  0.500  1.0
  Ir  Ir4  1  0.184  0.684  0.000  1.0
  Ir  Ir5  1  0.316  0.184  0.000  1.0
  Ir  Ir6  1  0.684  0.816  0.000  1.0
  Ir  Ir7  1  0.816  0.316  0.000  1.0
[/CIF]
.