The structure described by Na3Cl crystallizes in the tetragonal P4/mmm space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to four equivalent Na(1) and eight equivalent Na(2) atoms to form a mixture of distorted face and corner-sharing NaNa12 cuboctahedra. In the second Na site, Na(2) is bonded in a 4-coordinate geometry to four equivalent Na(1) and four equivalent Cl(1) atoms. Cl(1) is bonded in a body-centered cubic geometry to eight equivalent Na(2) atoms. is represented by the CIF card [CIF]
data_Na3Cl
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.486
_cell_length_b   3.486
_cell_length_c   9.487
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   115.315
_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  Na0  1  0.000  0.000  0.500  1.0
  Na  Na1  1  0.500  0.500  0.826  1.0
  Na  Na2  1  0.500  0.500  0.174  1.0
  Cl  Cl3  1  0.000  0.000  0.000  1.0
[/CIF]
.
The structure described by Na3Cl crystallizes in the tetragonal P4/mmm space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to four equivalent Na(1) and eight equivalent Na(2) atoms to form a mixture of distorted face and corner-sharing NaNa12 cuboctahedra. In the second Na site, Na(2) is bonded in a 4-coordinate geometry to four equivalent Na(1) and four equivalent Cl(1) atoms. Cl(1) is bonded in a body-centered cubic geometry to eight equivalent Na(2) atoms. is represented by the CIF card [CIF]
data_Na3Cl
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.486
_cell_length_b   3.486
_cell_length_c   9.487
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   115.315
_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  Na0  1  0.000  0.000  0.500  1.0
  Na  Na1  1  0.500  0.500  0.826  1.0
  Na  Na2  1  0.500  0.500  0.174  1.0
  Cl  Cl3  1  0.000  0.000  0.000  1.0
[/CIF]
.