data_CaCdSi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.4
_cell_length_b   4.4
_cell_length_c   4.16
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   CaCdSi2
_chemical_formula_sum   'Ca1 Cd1 Si2'
_cell_volume   80.61
_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
  Ca  Ca0  1  0.0  0.0  0.0  1.0
  Cd  Cd1  1  0.2  0.2  0.0  1.0
  Si  Si2  1  0.2  0.0  0.08  1.0
  Si  Si3  1  0.0  0.2  0.08  1.0

data_CaCdSi2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.23
_cell_length_b   6.23
_cell_length_c   4.16
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   CaCdSi2
_chemical_formula_sum   'Ca2 Cd2 Si4'
_cell_volume   161.23
_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
  Ca  Ca0  2  0.0  0.0  0.0  1.0
  Cd  Cd1  2  0.2  0.0  -0.0  1.0
  Si  Si2  4  0.1  0.1  0.08  1.0

Ca Cd Si Si
Ca Cd Si Si 0 3 o o o 0 2 o o o 1 3 o o o 1 2 o o o 
CaCdSi2 is alpha Po structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two CaCdSi2 clusters. Ca(1) is bonded in an L-shaped geometry to two equivalent Si(1) atoms. Both Ca(1)-Si(1) bond lengths are 0.95 Å. Cd(1) is bonded in a distorted L-shaped geometry to two equivalent Si(1) atoms. Both Cd(1)-Si(1) bond lengths are 0.95 Å. Si(1) is bonded in a distorted L-shaped geometry to one Ca(1) and one Cd(1) atom.