data_Nb2CdSi
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.93
_cell_length_b   2.93
_cell_length_c   8.07
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Nb2CdSi
_chemical_formula_sum   'Nb2 Cd1 Si1'
_cell_volume   69.24
_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
  Nb  Nb1  1  0.47  0.47  0.34  1.0
  Nb  Nb2  1  0.47  0.47  0.72  1.0
  Cd  Cd0  1  0.0  0.0  0.03  1.0
  Si  Si3  1  0.0  0.0  0.0  1.0

data_Nb2CdSi
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.14
_cell_length_b   4.14
_cell_length_c   8.07
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Nb2CdSi
_chemical_formula_sum   'Nb4 Cd2 Si2'
_cell_volume   138.49
_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
  Nb  Nb0  2  0.47  0.0  0.34  1.0
  Nb  Nb1  2  0.47  0.0  0.72  1.0
  Cd  Cd2  2  0.0  0.0  0.03  1.0
  Si  Si3  2  0.0  0.0  0.0  1.0

Nb Nb Cd Si
Nb2CdSi crystallizes in the monoclinic Cm space group. There are two inequivalent Nb sites. In the first Nb site, Nb(1) is bonded in a 9-coordinate geometry to one Nb(2), four equivalent Nb(1), and four equivalent Cd(1) atoms. The Nb(1)-Nb(2) bond length is 3.08 Å. All Nb(1)-Nb(1) bond lengths are 2.93 Å. There are a spread of Nb(1)-Cd(1) bond distances ranging from 3.15-3.34 Å. In the second Nb site, Nb(2) is bonded in a 9-coordinate geometry to one Nb(1), four equivalent Nb(2), and four equivalent Si(1) atoms. All Nb(2)-Nb(2) bond lengths are 2.93 Å. There are a spread of Nb(2)-Si(1) bond distances ranging from 2.95-3.14 Å. Cd(1) is bonded in a single-bond geometry to four equivalent Nb(1) and one Si(1) atom. The Cd(1)-Si(1) bond length is 0.26 Å. Si(1) is bonded in a single-bond geometry to four equivalent Nb(2) and one Cd(1) atom.