data_CdSi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.31
_cell_length_b   4.31
_cell_length_c   6.29
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   CdSi2
_chemical_formula_sum   'Cd2 Si4'
_cell_volume   117.0
_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
  Cd  Cd0  1  0.16  0.0  0.94  1.0
  Cd  Cd1  1  0.0  0.16  0.35  1.0
  Si  Si2  1  0.0  0.0  0.0  1.0
  Si  Si3  1  0.16  0.16  0.0  1.0
  Si  Si4  1  0.16  0.0  0.25  1.0
  Si  Si5  1  0.0  0.16  0.04  1.0

data_CdSi2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.1
_cell_length_b   6.1
_cell_length_c   6.29
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   CdSi2
_chemical_formula_sum   'Cd4 Si8'
_cell_volume   234.0
_cell_formula_units_Z   4
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
  Cd  Cd0  2  0.0  0.0  0.35  1.0
  Cd  Cd1  2  0.16  0.0  0.94  1.0
  Si  Si2  4  0.08  0.08  0.0  1.0
  Si  Si3  2  0.0  0.0  0.04  1.0
  Si  Si4  2  0.16  0.0  0.25  1.0

Cd Cd Si Si Si Si
Cd Cd Si Si Si Si 0 2 o o + 0 3 o o + 1 4 o o o 2 5 o o o 3 5 o o o 
CdSi3CdSi1 is Cubic alpha N2-like structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two CdSi1 clusters and two CdSi3 clusters. In each CdSi1 cluster, Cd(2) is bonded in a distorted single-bond geometry to one Si(2) atom. The Cd(2)-Si(2) bond length is 1.15 Å. Si(2) is bonded in a distorted single-bond geometry to one Cd(2) atom. In each CdSi3 cluster, Cd(1) is bonded in a 2-coordinate geometry to two equivalent Si(1) atoms. Both Cd(1)-Si(1) bond lengths are 0.79 Å. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 2-coordinate geometry to one Cd(1) and one Si(3) atom. The Si(1)-Si(3) bond length is 0.72 Å. In the second Si site, Si(3) is bonded in a distorted L-shaped geometry to two equivalent Si(1) atoms.