The structure described by Na3(CoO2)4 crystallizes in the orthorhombic Pmmn space group. There are three inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to two equivalent O(3) and four equivalent O(1) atoms. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to two equivalent O(3) and four equivalent O(2) atoms. In the third Na site, Na(3) is bonded in a 6-coordinate geometry to two equivalent O(2) and four equivalent O(4) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), two equivalent O(2), and three equivalent O(4) atoms to form edge-sharing CoO6 octahedra. In the second Co site, Co(2) is bonded to one O(2), two equivalent O(1), and three equivalent O(3) atoms to form edge-sharing CoO6 octahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Na(1), one Co(1), and two equivalent Co(2) atoms to form distorted ONa2Co3 trigonal bipyramids that share corners with three equivalent O(4)Na2Co3 square pyramids, corners with two equivalent O(1)Na2Co3 trigonal bipyramids, corners with four equivalent O(3)Na2Co3 trigonal bipyramids, edges with two equivalent O(2)Na3Co3 octahedra, edges with three equivalent O(1)Na2Co3 trigonal bipyramids, and edges with three equivalent O(3)Na2Co3 trigonal bipyramids. In the second O site, O(2) is bonded to one Na(3), two equivalent Na(2), one Co(2), and two equivalent Co(1) atoms to form ONa3Co3 octahedra that share corners with two equivalent O(2)Na3Co3 octahedra, corners with four equivalent O(4)Na2Co3 square pyramids, corners with three equivalent O(3)Na2Co3 trigonal bipyramids, edges with two equivalent O(2)Na3Co3 octahedra, edges with three equivalent O(4)Na2Co3 square pyramids, edges with two equivalent O(1)Na2Co3 trigonal bipyramids, edges with two equivalent O(3)Na2Co3 trigonal bipyramids, and  a faceface with one O(2)Na3Co3 octahedra. The corner-sharing octahedral tilt angles are 47°. In the third O site, O(3) is bonded to one Na(1), one Na(2), and three equivalent Co(2) atoms to form ONa2Co3 trigonal bipyramids that share corners with three equivalent O(2)Na3Co3 octahedra, corners with two equivalent O(3)Na2Co3 trigonal bipyramids, corners with four equivalent O(1)Na2Co3 trigonal bipyramids, edges with two equivalent O(2)Na3Co3 octahedra, edges with three equivalent O(1)Na2Co3 trigonal bipyramids, and edges with three equivalent O(3)Na2Co3 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 3-39°. In the fourth O site, O(4) is bonded to two equivalent Na(3) and three equivalent Co(1) atoms to form ONa2Co3 square pyramids that share corners with four equivalent O(2)Na3Co3 octahedra, corners with two equivalent O(4)Na2Co3 square pyramids, corners with three equivalent O(1)Na2Co3 trigonal bipyramids, edges with three equivalent O(2)Na3Co3 octahedra, and edges with five equivalent O(4)Na2Co3 square pyramids. The corner-sharing octahedral tilt angles range from 1-49°. is represented by the CIF card [CIF]
data_Na3(CoO2)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.846
_cell_length_b   9.716
_cell_length_c   10.708
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   296.108
_cell_formula_units_Z   2
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  0.356  0.500  1.0
  Na  Na1  1  0.000  0.696  0.500  1.0
  Na  Na2  1  0.000  0.007  0.000  1.0
  Na  Na3  1  0.500  0.644  0.000  1.0
  Na  Na4  1  0.500  0.993  0.500  1.0
  Na  Na5  1  0.500  0.304  0.000  1.0
  Co  Co6  1  0.000  0.874  0.747  1.0
  Co  Co7  1  0.000  0.874  0.253  1.0
  Co  Co8  1  0.000  0.376  0.755  1.0
  Co  Co9  1  0.000  0.376  0.245  1.0
  Co  Co10  1  0.500  0.624  0.745  1.0
  Co  Co11  1  0.500  0.624  0.255  1.0
  Co  Co12  1  0.500  0.126  0.247  1.0
  Co  Co13  1  0.500  0.126  0.753  1.0
  O  O14  1  0.000  0.707  0.835  1.0
  O  O15  1  0.000  0.207  0.848  1.0
  O  O16  1  0.000  0.707  0.165  1.0
  O  O17  1  0.000  0.538  0.657  1.0
  O  O18  1  0.000  0.207  0.152  1.0
  O  O19  1  0.000  0.045  0.661  1.0
  O  O20  1  0.000  0.538  0.343  1.0
  O  O21  1  0.000  0.045  0.339  1.0
  O  O22  1  0.500  0.462  0.843  1.0
  O  O23  1  0.500  0.955  0.839  1.0
  O  O24  1  0.500  0.793  0.652  1.0
  O  O25  1  0.500  0.293  0.665  1.0
  O  O26  1  0.500  0.955  0.161  1.0
  O  O27  1  0.500  0.793  0.348  1.0
  O  O28  1  0.500  0.462  0.157  1.0
  O  O29  1  0.500  0.293  0.335  1.0
[/CIF]
.
The structure described by Na3(CoO2)4 crystallizes in the orthorhombic Pmmn space group. There are three inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to two equivalent O(3) and four equivalent O(1) atoms. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to two equivalent O(3) and four equivalent O(2) atoms. In the third Na site, Na(3) is bonded in a 6-coordinate geometry to two equivalent O(2) and four equivalent O(4) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), two equivalent O(2), and three equivalent O(4) atoms to form edge-sharing CoO6 octahedra. In the second Co site, Co(2) is bonded to one O(2), two equivalent O(1), and three equivalent O(3) atoms to form edge-sharing CoO6 octahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Na(1), one Co(1), and two equivalent Co(2) atoms to form distorted ONa2Co3 trigonal bipyramids that share corners with three equivalent O(4)Na2Co3 square pyramids, corners with two equivalent O(1)Na2Co3 trigonal bipyramids, corners with four equivalent O(3)Na2Co3 trigonal bipyramids, edges with two equivalent O(2)Na3Co3 octahedra, edges with three equivalent O(1)Na2Co3 trigonal bipyramids, and edges with three equivalent O(3)Na2Co3 trigonal bipyramids. In the second O site, O(2) is bonded to one Na(3), two equivalent Na(2), one Co(2), and two equivalent Co(1) atoms to form ONa3Co3 octahedra that share corners with two equivalent O(2)Na3Co3 octahedra, corners with four equivalent O(4)Na2Co3 square pyramids, corners with three equivalent O(3)Na2Co3 trigonal bipyramids, edges with two equivalent O(2)Na3Co3 octahedra, edges with three equivalent O(4)Na2Co3 square pyramids, edges with two equivalent O(1)Na2Co3 trigonal bipyramids, edges with two equivalent O(3)Na2Co3 trigonal bipyramids, and  a faceface with one O(2)Na3Co3 octahedra. The corner-sharing octahedral tilt angles are 47°. In the third O site, O(3) is bonded to one Na(1), one Na(2), and three equivalent Co(2) atoms to form ONa2Co3 trigonal bipyramids that share corners with three equivalent O(2)Na3Co3 octahedra, corners with two equivalent O(3)Na2Co3 trigonal bipyramids, corners with four equivalent O(1)Na2Co3 trigonal bipyramids, edges with two equivalent O(2)Na3Co3 octahedra, edges with three equivalent O(1)Na2Co3 trigonal bipyramids, and edges with three equivalent O(3)Na2Co3 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 3-39°. In the fourth O site, O(4) is bonded to two equivalent Na(3) and three equivalent Co(1) atoms to form ONa2Co3 square pyramids that share corners with four equivalent O(2)Na3Co3 octahedra, corners with two equivalent O(4)Na2Co3 square pyramids, corners with three equivalent O(1)Na2Co3 trigonal bipyramids, edges with three equivalent O(2)Na3Co3 octahedra, and edges with five equivalent O(4)Na2Co3 square pyramids. The corner-sharing octahedral tilt angles range from 1-49°. is represented by the CIF card [CIF]
data_Na3(CoO2)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.846
_cell_length_b   9.716
_cell_length_c   10.708
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   296.108
_cell_formula_units_Z   2
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  0.356  0.500  1.0
  Na  Na1  1  0.000  0.696  0.500  1.0
  Na  Na2  1  0.000  0.007  0.000  1.0
  Na  Na3  1  0.500  0.644  0.000  1.0
  Na  Na4  1  0.500  0.993  0.500  1.0
  Na  Na5  1  0.500  0.304  0.000  1.0
  Co  Co6  1  0.000  0.874  0.747  1.0
  Co  Co7  1  0.000  0.874  0.253  1.0
  Co  Co8  1  0.000  0.376  0.755  1.0
  Co  Co9  1  0.000  0.376  0.245  1.0
  Co  Co10  1  0.500  0.624  0.745  1.0
  Co  Co11  1  0.500  0.624  0.255  1.0
  Co  Co12  1  0.500  0.126  0.247  1.0
  Co  Co13  1  0.500  0.126  0.753  1.0
  O  O14  1  0.000  0.707  0.835  1.0
  O  O15  1  0.000  0.207  0.848  1.0
  O  O16  1  0.000  0.707  0.165  1.0
  O  O17  1  0.000  0.538  0.657  1.0
  O  O18  1  0.000  0.207  0.152  1.0
  O  O19  1  0.000  0.045  0.661  1.0
  O  O20  1  0.000  0.538  0.343  1.0
  O  O21  1  0.000  0.045  0.339  1.0
  O  O22  1  0.500  0.462  0.843  1.0
  O  O23  1  0.500  0.955  0.839  1.0
  O  O24  1  0.500  0.793  0.652  1.0
  O  O25  1  0.500  0.293  0.665  1.0
  O  O26  1  0.500  0.955  0.161  1.0
  O  O27  1  0.500  0.793  0.348  1.0
  O  O28  1  0.500  0.462  0.157  1.0
  O  O29  1  0.500  0.293  0.335  1.0
[/CIF]
.