The structure described by LaIrSi3 crystallizes in the tetragonal I4mm space group. La(1) is bonded in a 17-coordinate geometry to five equivalent Ir(1), four equivalent Si(2), and eight equivalent Si(1) atoms. Ir(1) is bonded in a 5-coordinate geometry to five equivalent La(1), one Si(2), and four equivalent Si(1) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a distorted bent 120 degrees geometry to four equivalent La(1), two equivalent Ir(1), and two equivalent Si(2) atoms. In the second Si site, Si(2) is bonded in a distorted single-bond geometry to four equivalent La(1), one Ir(1), and four equivalent Si(1) atoms. is represented by the CIF file [CIF]
data_LaSi3Ir
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.288
_cell_length_b   4.288
_cell_length_c   5.794
_cell_angle_alpha   111.717
_cell_angle_beta   111.717
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   90.778
_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
  La  La0  1  0.999  0.999  0.997  1.0
  Si  Si1  1  0.762  0.262  0.524  1.0
  Si  Si2  1  0.262  0.762  0.524  1.0
  Si  Si3  1  0.413  0.413  0.825  1.0
  Ir  Ir4  1  0.654  0.654  0.308  1.0
[/CIF]
.
The structure described by LaIrSi3 crystallizes in the tetragonal I4mm space group. La(1) is bonded in a 17-coordinate geometry to five equivalent Ir(1), four equivalent Si(2), and eight equivalent Si(1) atoms. Ir(1) is bonded in a 5-coordinate geometry to five equivalent La(1), one Si(2), and four equivalent Si(1) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a distorted bent 120 degrees geometry to four equivalent La(1), two equivalent Ir(1), and two equivalent Si(2) atoms. In the second Si site, Si(2) is bonded in a distorted single-bond geometry to four equivalent La(1), one Ir(1), and four equivalent Si(1) atoms. is represented by the CIF file [CIF]
data_LaSi3Ir
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.288
_cell_length_b   4.288
_cell_length_c   5.794
_cell_angle_alpha   111.717
_cell_angle_beta   111.717
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   90.778
_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
  La  La0  1  0.999  0.999  0.997  1.0
  Si  Si1  1  0.762  0.262  0.524  1.0
  Si  Si2  1  0.262  0.762  0.524  1.0
  Si  Si3  1  0.413  0.413  0.825  1.0
  Ir  Ir4  1  0.654  0.654  0.308  1.0
[/CIF]
.