data_CrSi2Ir
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.13
_cell_length_b   3.13
_cell_length_c   5.33
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   CrSi2Ir
_chemical_formula_sum   'Cr1 Si2 Ir1'
_cell_volume   52.22
_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
  Cr  Cr0  1  0.0  0.0  0.39  1.0
  Si  Si2  1  0.0  0.0  0.3  1.0
  Si  Si3  1  0.57  0.57  0.44  1.0
  Ir  Ir1  1  0.57  0.57  0.19  1.0

data_CrSi2Ir
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.43
_cell_length_b   4.43
_cell_length_c   5.33
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   CrSi2Ir
_chemical_formula_sum   'Cr2 Si4 Ir2'
_cell_volume   104.45
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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
  Cr  Cr0  2  0.0  0.0  0.39  1.0
  Si  Si1  2  0.0  0.0  0.3  1.0
  Si  Si2  2  0.07  0.5  0.44  1.0
  Ir  Ir3  2  0.07  0.5  0.19  1.0

Cr Si Si Ir
Cr Si Si Ir 0 1 o o o 2 3 o o o 
CrSiIrSi crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two chromium mono silicide molecules and two IrSi clusters. In each IrSi cluster, Ir(1) is bonded in a distorted single-bond geometry to one Si(2) atom. The Ir(1)-Si(2) bond length is 1.33 Å. Si(2) is bonded in a single-bond geometry to one Ir(1) atom.