The crystal structure described by Na is alpha structured and crystallizes in the cubic I-43m space group. There are four inequivalent Na sites. In the first Na site, Na(1) is bonded in a 16-coordinate geometry to four equivalent Na(2) and twelve equivalent Na(3) atoms. In the second Na site, Na(2) is bonded in a 3-coordinate geometry to one Na(1), three equivalent Na(4), and six equivalent Na(3) atoms. In the third Na site, Na(3) is bonded in a 11-coordinate geometry to one Na(1), two equivalent Na(2), three equivalent Na(3), and five equivalent Na(4) atoms. In the fourth Na site, Na(4) is bonded to one Na(2), five equivalent Na(3), and six equivalent Na(4) atoms to form a mixture of distorted face, corner, and edge-sharing NaNa12 cuboctahedra. is represented by the CIF file [CIF]
data_Na
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.263
_cell_length_b   11.263
_cell_length_c   11.263
_cell_angle_alpha   109.471
_cell_angle_beta   109.471
_cell_angle_gamma   109.471
_symmetry_Int_Tables_number   1
_cell_volume   1099.733
_cell_formula_units_Z   29
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  0.000  1.0
  Na  Na1  1  0.636  0.000  0.000  1.0
  Na  Na2  1  0.375  0.190  0.000  1.0
  Na  Na3  1  0.190  0.375  0.000  1.0
  Na  Na4  1  0.682  0.406  0.000  1.0
  Na  Na5  1  0.000  0.636  0.000  1.0
  Na  Na6  1  0.406  0.682  0.000  1.0
  Na  Na7  1  0.810  0.810  0.185  1.0
  Na  Na8  1  0.375  0.000  0.190  1.0
  Na  Na9  1  0.000  0.375  0.190  1.0
  Na  Na10  1  0.594  0.594  0.277  1.0
  Na  Na11  1  0.723  0.318  0.318  1.0
  Na  Na12  1  0.318  0.723  0.318  1.0
  Na  Na13  1  0.364  0.364  0.364  1.0
  Na  Na14  1  0.190  0.000  0.375  1.0
  Na  Na15  1  0.000  0.190  0.375  1.0
  Na  Na16  1  0.682  0.000  0.406  1.0
  Na  Na17  1  0.000  0.682  0.406  1.0
  Na  Na18  1  0.594  0.277  0.594  1.0
  Na  Na19  1  0.277  0.594  0.594  1.0
  Na  Na20  1  0.815  0.625  0.625  1.0
  Na  Na21  1  0.625  0.815  0.625  1.0
  Na  Na22  1  0.000  0.000  0.636  1.0
  Na  Na23  1  0.406  0.000  0.682  1.0
  Na  Na24  1  0.000  0.406  0.682  1.0
  Na  Na25  1  0.318  0.318  0.723  1.0
  Na  Na26  1  0.810  0.185  0.810  1.0
  Na  Na27  1  0.185  0.810  0.810  1.0
  Na  Na28  1  0.625  0.625  0.815  1.0
[/CIF]
.
The crystal structure described by Na is alpha structured and crystallizes in the cubic I-43m space group. There are four inequivalent Na sites. In the first Na site, Na(1) is bonded in a 16-coordinate geometry to four equivalent Na(2) and twelve equivalent Na(3) atoms. In the second Na site, Na(2) is bonded in a 3-coordinate geometry to one Na(1), three equivalent Na(4), and six equivalent Na(3) atoms. In the third Na site, Na(3) is bonded in a 11-coordinate geometry to one Na(1), two equivalent Na(2), three equivalent Na(3), and five equivalent Na(4) atoms. In the fourth Na site, Na(4) is bonded to one Na(2), five equivalent Na(3), and six equivalent Na(4) atoms to form a mixture of distorted face, corner, and edge-sharing NaNa12 cuboctahedra. is represented by the CIF file [CIF]
data_Na
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.263
_cell_length_b   11.263
_cell_length_c   11.263
_cell_angle_alpha   109.471
_cell_angle_beta   109.471
_cell_angle_gamma   109.471
_symmetry_Int_Tables_number   1
_cell_volume   1099.733
_cell_formula_units_Z   29
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  0.000  1.0
  Na  Na1  1  0.636  0.000  0.000  1.0
  Na  Na2  1  0.375  0.190  0.000  1.0
  Na  Na3  1  0.190  0.375  0.000  1.0
  Na  Na4  1  0.682  0.406  0.000  1.0
  Na  Na5  1  0.000  0.636  0.000  1.0
  Na  Na6  1  0.406  0.682  0.000  1.0
  Na  Na7  1  0.810  0.810  0.185  1.0
  Na  Na8  1  0.375  0.000  0.190  1.0
  Na  Na9  1  0.000  0.375  0.190  1.0
  Na  Na10  1  0.594  0.594  0.277  1.0
  Na  Na11  1  0.723  0.318  0.318  1.0
  Na  Na12  1  0.318  0.723  0.318  1.0
  Na  Na13  1  0.364  0.364  0.364  1.0
  Na  Na14  1  0.190  0.000  0.375  1.0
  Na  Na15  1  0.000  0.190  0.375  1.0
  Na  Na16  1  0.682  0.000  0.406  1.0
  Na  Na17  1  0.000  0.682  0.406  1.0
  Na  Na18  1  0.594  0.277  0.594  1.0
  Na  Na19  1  0.277  0.594  0.594  1.0
  Na  Na20  1  0.815  0.625  0.625  1.0
  Na  Na21  1  0.625  0.815  0.625  1.0
  Na  Na22  1  0.000  0.000  0.636  1.0
  Na  Na23  1  0.406  0.000  0.682  1.0
  Na  Na24  1  0.000  0.406  0.682  1.0
  Na  Na25  1  0.318  0.318  0.723  1.0
  Na  Na26  1  0.810  0.185  0.810  1.0
  Na  Na27  1  0.185  0.810  0.810  1.0
  Na  Na28  1  0.625  0.625  0.815  1.0
[/CIF]
.