data_Na2Cl
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.94
_cell_length_b   6.94
_cell_length_c   6.94
_cell_angle_alpha   150.74
_cell_angle_beta   150.74
_cell_angle_gamma   41.86
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Na2Cl
_chemical_formula_sum   'Na2 Cl1'
_cell_volume   79.55
_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
  Na  Na1  1  0.0  0.0  0.17  1.0
  Na  Na2  1  0.0  0.0  0.79  1.0
  Cl  Cl0  1  0.0  0.0  0.0  1.0

data_Na2Cl
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.96
_cell_length_b   4.96
_cell_length_c   6.94
_cell_angle_alpha   90.0
_cell_angle_beta   110.93
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Na2Cl
_chemical_formula_sum   'Na4 Cl2'
_cell_volume   159.1
_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
  Na  Na0  2  0.17  0.0  0.17  1.0
  Na  Na1  2  0.29  0.5  0.79  1.0
  Cl  Cl2  2  0.0  0.0  0.0  1.0

Na Na Cl
Na Na Cl 0 2 o o o 1 2 o o + 
Na2Cl is Cyanogen Chloride-derived structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two Na2Cl clusters. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a single-bond geometry to one Cl(1) atom. The Na(1)-Cl(1) bond length is 1.19 Å. In the second Na site, Na(2) is bonded in a single-bond geometry to one Cl(1) atom. The Na(2)-Cl(1) bond length is 1.48 Å. Cl(1) is bonded in a linear geometry to one Na(1) and one Na(2) atom.