data_NbSi2Cl
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.56
_cell_length_b   3.56
_cell_length_c   5.05
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NbSi2Cl
_chemical_formula_sum   'Nb1 Si2 Cl1'
_cell_volume   63.98
_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  0.78  0.78  0.0  1.0
  Si  Si2  1  0.78  0.0  0.52  1.0
  Si  Si3  1  0.0  0.78  0.52  1.0
  Cl  Cl0  1  0.0  0.0  0.0  1.0

data_NbSi2Cl
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.04
_cell_length_b   5.04
_cell_length_c   5.05
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   NbSi2Cl
_chemical_formula_sum   'Nb2 Si4 Cl2'
_cell_volume   127.95
_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  0.28  0.5  0.0  1.0
  Si  Si1  4  0.39  0.39  0.52  1.0
  Cl  Cl2  2  0.0  0.0  0.0  1.0

Nb Si Si Cl
NbCl(Si)2 is High Pressure Cadmuum Telluride structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two disilane molecules and two NbCl clusters. In each NbCl cluster, Nb(1) is bonded in a single-bond geometry to one Cl(1) atom. The Nb(1)-Cl(1) bond length is 1.11 Å. Cl(1) is bonded in a single-bond geometry to one Nb(1) atom.