The structure described by Na4CO4 crystallizes in the trigonal R3m space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a trigonal planar geometry to one O(1) and two equivalent O(2) atoms. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to six equivalent O(2) atoms. C(1) is bonded in a tetrahedral geometry to one O(1) and three equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to three equivalent Na(1) and one C(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to two equivalent Na(1), two equivalent Na(2), and one C(1) atom. is represented by the CIF file [CIF]
data_Na4CO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.319
_cell_length_b   5.319
_cell_length_c   5.319
_cell_angle_alpha   72.041
_cell_angle_beta   72.041
_cell_angle_gamma   72.041
_symmetry_Int_Tables_number   1
_cell_volume   132.379
_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  0.573  0.055  0.573  1.0
  Na  Na1  1  0.573  0.573  0.055  1.0
  Na  Na2  1  0.055  0.573  0.573  1.0
  Na  Na3  1  0.177  0.177  0.177  1.0
  C  C4  1  0.960  0.960  0.960  1.0
  O  O5  1  0.843  0.843  0.843  1.0
  O  O6  1  0.752  0.128  0.128  1.0
  O  O7  1  0.128  0.128  0.752  1.0
  O  O8  1  0.128  0.752  0.128  1.0
[/CIF]
.
The structure described by Na4CO4 crystallizes in the trigonal R3m space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a trigonal planar geometry to one O(1) and two equivalent O(2) atoms. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to six equivalent O(2) atoms. C(1) is bonded in a tetrahedral geometry to one O(1) and three equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to three equivalent Na(1) and one C(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to two equivalent Na(1), two equivalent Na(2), and one C(1) atom. is represented by the CIF file [CIF]
data_Na4CO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.319
_cell_length_b   5.319
_cell_length_c   5.319
_cell_angle_alpha   72.041
_cell_angle_beta   72.041
_cell_angle_gamma   72.041
_symmetry_Int_Tables_number   1
_cell_volume   132.379
_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  0.573  0.055  0.573  1.0
  Na  Na1  1  0.573  0.573  0.055  1.0
  Na  Na2  1  0.055  0.573  0.573  1.0
  Na  Na3  1  0.177  0.177  0.177  1.0
  C  C4  1  0.960  0.960  0.960  1.0
  O  O5  1  0.843  0.843  0.843  1.0
  O  O6  1  0.752  0.128  0.128  1.0
  O  O7  1  0.128  0.128  0.752  1.0
  O  O8  1  0.128  0.752  0.128  1.0
[/CIF]
.