The structure described by Na4CO4 crystallizes in the monoclinic Cm space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 4-coordinate geometry to one O(2), one O(3), and two equivalent O(1) atoms. In the second Na site, Na(2) is bonded in a distorted trigonal planar geometry to one O(2) and two equivalent O(1) atoms. C(1) is bonded in a tetrahedral geometry to one O(2), one O(3), and two equivalent O(1) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to two equivalent Na(1), two equivalent Na(2), and one C(1) atom. In the second O site, O(2) is bonded in a distorted trigonal bipyramidal geometry to two equivalent Na(1), two equivalent Na(2), and one C(1) atom. In the third O site, O(3) is bonded in a T-shaped geometry to two equivalent Na(1) and one C(1) atom. is represented by the CIF card [CIF]
data_Na4CO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.193
_cell_length_b   5.193
_cell_length_c   5.436
_cell_angle_alpha   77.675
_cell_angle_beta   77.675
_cell_angle_gamma   95.197
_symmetry_Int_Tables_number   1
_cell_volume   138.476
_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  0.470  0.907  0.551  1.0
  Na  Na1  1  0.616  0.030  0.037  1.0
  Na  Na2  1  0.907  0.470  0.551  1.0
  Na  Na3  1  0.030  0.616  0.037  1.0
  C  C4  1  0.013  0.013  0.464  1.0
  O  O5  1  0.854  0.159  0.317  1.0
  O  O6  1  0.820  0.820  0.709  1.0
  O  O7  1  0.173  0.173  0.556  1.0
  O  O8  1  0.159  0.854  0.317  1.0
[/CIF]
.
The structure described by Na4CO4 crystallizes in the monoclinic Cm space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 4-coordinate geometry to one O(2), one O(3), and two equivalent O(1) atoms. In the second Na site, Na(2) is bonded in a distorted trigonal planar geometry to one O(2) and two equivalent O(1) atoms. C(1) is bonded in a tetrahedral geometry to one O(2), one O(3), and two equivalent O(1) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to two equivalent Na(1), two equivalent Na(2), and one C(1) atom. In the second O site, O(2) is bonded in a distorted trigonal bipyramidal geometry to two equivalent Na(1), two equivalent Na(2), and one C(1) atom. In the third O site, O(3) is bonded in a T-shaped geometry to two equivalent Na(1) and one C(1) atom. is represented by the CIF card [CIF]
data_Na4CO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.193
_cell_length_b   5.193
_cell_length_c   5.436
_cell_angle_alpha   77.675
_cell_angle_beta   77.675
_cell_angle_gamma   95.197
_symmetry_Int_Tables_number   1
_cell_volume   138.476
_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  0.470  0.907  0.551  1.0
  Na  Na1  1  0.616  0.030  0.037  1.0
  Na  Na2  1  0.907  0.470  0.551  1.0
  Na  Na3  1  0.030  0.616  0.037  1.0
  C  C4  1  0.013  0.013  0.464  1.0
  O  O5  1  0.854  0.159  0.317  1.0
  O  O6  1  0.820  0.820  0.709  1.0
  O  O7  1  0.173  0.173  0.556  1.0
  O  O8  1  0.159  0.854  0.317  1.0
[/CIF]
.