The material described by Na(CoO2)8 crystallizes in the triclinic P-1 space group. Na(1) is bonded in a 6-coordinate geometry to one O(11), one O(14), one O(2), one O(4), one O(6), and one O(7) atom. There are nine inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(11), one O(14), one O(15), one O(2), one O(3), and one O(5) atom to form distorted edge-sharing CoO6 octahedra. In the second Co site, Co(2) is bonded to one O(1), one O(12), one O(13), one O(16), and one O(9) atom to form CoO5 trigonal bipyramids that share  a cornercorner with one Co(3)O6 octahedra and  a cornercorner with one O(6)NaCo2O trigonal pyramid. The corner-sharing octahedral tilt angles are 77°. In the third Co site, Co(3) is bonded to one O(10), one O(13), one O(2), one O(3), one O(6), and one O(8) atom to form distorted CoO6 octahedra that share  a cornercorner with one Co(2)O5 trigonal bipyramid and  an edgeedge with one Co(1)O6 octahedra. In the fourth Co site, Co(4) is bonded in a square co-planar geometry to two equivalent O(12) and two equivalent O(8) atoms. In the fifth Co site, Co(5) is bonded in a 4-coordinate geometry to one O(11), one O(15), one O(4), and one O(8) atom. In the sixth Co site, Co(6) is bonded in a see-saw-like geometry to one O(1), one O(10), one O(8), and one O(9) atom. In the seventh Co site, Co(7) is bonded in a 5-coordinate geometry to one O(11), one O(13), one O(16), one O(3), and one O(6) atom. In the eighth Co site, Co(8) is bonded in a square co-planar geometry to two equivalent O(12) and two equivalent O(9) atoms. In the ninth Co site, Co(9) is bonded in a distorted see-saw-like geometry to one O(13), one O(14), one O(15), and one O(7) atom. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Co(2), one Co(6), and one O(6) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Na(1), one Co(1), one Co(3), and one O(7) atom. In the third O site, O(3) is bonded in a trigonal non-coplanar geometry to one Co(1), one Co(3), and one Co(7) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Na(1), one Co(5), and one O(5) atom. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to one Co(1) and one O(4) atom. In the sixth O site, O(6) is bonded to one Na(1), one Co(3), one Co(7), and one O(1) atom to form distorted ONaCo2O trigonal pyramids that share corners with two equivalent O(13)Co4 tetrahedra,  a cornercorner with one Co(2)O5 trigonal bipyramid, and  an edgeedge with one O(11)NaCo3 tetrahedra. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Na(1), one Co(9), and one O(2) atom. In the eighth O site, O(8) is bonded in a distorted rectangular see-saw-like geometry to one Co(3), one Co(4), one Co(5), and one Co(6) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Co(2), one Co(6), and one Co(8) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Co(3), one Co(6), and one O(16) atom. In the eleventh O site, O(11) is bonded to one Na(1), one Co(1), one Co(5), and one Co(7) atom to form ONaCo3 tetrahedra that share  a cornercorner with one O(13)Co4 tetrahedra and  an edgeedge with one O(6)NaCo2O trigonal pyramid. In the twelfth O site, O(12) is bonded in a distorted T-shaped geometry to one Co(2), one Co(4), and one Co(8) atom. In the thirteenth O site, O(13) is bonded to one Co(2), one Co(3), one Co(7), and one Co(9) atom to form OCo4 tetrahedra that share  a cornercorner with one O(11)NaCo3 tetrahedra and corners with two equivalent O(6)NaCo2O trigonal pyramids. In the fourteenth O site, O(14) is bonded in a distorted trigonal planar geometry to one Na(1), one Co(1), and one Co(9) atom. In the fifteenth O site, O(15) is bonded in a distorted trigonal planar geometry to one Co(1), one Co(5), and one Co(9) atom. In the sixteenth O site, O(16) is bonded in a distorted trigonal planar geometry to one Co(2), one Co(7), and one O(10) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na(CoO2)8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.711
_cell_length_b   7.177
_cell_length_c   12.220
_cell_angle_alpha   78.077
_cell_angle_beta   86.955
_cell_angle_gamma   77.054
_symmetry_Int_Tables_number   1
_cell_volume   561.218
_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  0.617  0.148  0.091  1.0
  Na  Na1  1  0.383  0.852  0.909  1.0
  Co  Co2  1  0.873  0.281  0.864  1.0
  Co  Co3  1  0.792  0.733  0.633  1.0
  Co  Co4  1  0.650  0.130  0.704  1.0
  Co  Co5  1  0.500  0.500  0.500  1.0
  Co  Co6  1  0.285  0.354  0.816  1.0
  Co  Co7  1  0.297  0.677  0.640  1.0
  Co  Co8  1  0.350  0.870  0.296  1.0
  Co  Co9  1  0.208  0.267  0.367  1.0
  Co  Co10  1  0.110  0.096  0.681  1.0
  Co  Co11  1  0.000  0.500  0.500  1.0
  Co  Co12  1  0.060  0.251  0.122  1.0
  Co  Co13  1  0.127  0.719  0.136  1.0
  Co  Co14  1  0.890  0.904  0.319  1.0
  Co  Co15  1  0.703  0.323  0.360  1.0
  Co  Co16  1  0.715  0.646  0.184  1.0
  Co  Co17  1  0.940  0.749  0.878  1.0
  O  O18  1  0.484  0.213  0.318  1.0
  O  O19  1  0.348  0.901  0.122  1.0
  O  O20  1  0.848  0.266  0.711  1.0
  O  O21  1  0.563  0.523  0.109  1.0
  O  O22  1  0.634  0.488  0.869  1.0
  O  O23  1  0.439  0.984  0.702  1.0
  O  O24  1  0.304  0.101  0.070  1.0
  O  O25  1  0.562  0.623  0.325  1.0
  O  O26  1  0.438  0.377  0.675  1.0
  O  O27  1  0.696  0.899  0.930  1.0
  O  O28  1  0.561  0.016  0.298  1.0
  O  O29  1  0.944  0.407  0.380  1.0
  O  O30  1  0.152  0.734  0.289  1.0
  O  O31  1  0.366  0.512  0.131  1.0
  O  O32  1  0.437  0.477  0.891  1.0
  O  O33  1  0.652  0.099  0.878  1.0
  O  O34  1  0.245  0.871  0.498  1.0
  O  O35  1  0.847  0.854  0.171  1.0
  O  O36  1  0.732  0.579  0.538  1.0
  O  O37  1  0.119  0.107  0.279  1.0
  O  O38  1  0.904  0.220  0.020  1.0
  O  O39  1  0.516  0.787  0.682  1.0
  O  O40  1  0.980  0.499  0.145  1.0
  O  O41  1  0.811  0.941  0.478  1.0
  O  O42  1  0.020  0.501  0.855  1.0
  O  O43  1  0.189  0.059  0.522  1.0
  O  O44  1  0.096  0.780  0.980  1.0
  O  O45  1  0.881  0.893  0.721  1.0
  O  O46  1  0.268  0.421  0.462  1.0
  O  O47  1  0.153  0.146  0.829  1.0
  O  O48  1  0.755  0.129  0.502  1.0
  O  O49  1  0.056  0.593  0.620  1.0
[/CIF]
.
The material described by Na(CoO2)8 crystallizes in the triclinic P-1 space group. Na(1) is bonded in a 6-coordinate geometry to one O(11), one O(14), one O(2), one O(4), one O(6), and one O(7) atom. There are nine inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(11), one O(14), one O(15), one O(2), one O(3), and one O(5) atom to form distorted edge-sharing CoO6 octahedra. In the second Co site, Co(2) is bonded to one O(1), one O(12), one O(13), one O(16), and one O(9) atom to form CoO5 trigonal bipyramids that share  a cornercorner with one Co(3)O6 octahedra and  a cornercorner with one O(6)NaCo2O trigonal pyramid. The corner-sharing octahedral tilt angles are 77°. In the third Co site, Co(3) is bonded to one O(10), one O(13), one O(2), one O(3), one O(6), and one O(8) atom to form distorted CoO6 octahedra that share  a cornercorner with one Co(2)O5 trigonal bipyramid and  an edgeedge with one Co(1)O6 octahedra. In the fourth Co site, Co(4) is bonded in a square co-planar geometry to two equivalent O(12) and two equivalent O(8) atoms. In the fifth Co site, Co(5) is bonded in a 4-coordinate geometry to one O(11), one O(15), one O(4), and one O(8) atom. In the sixth Co site, Co(6) is bonded in a see-saw-like geometry to one O(1), one O(10), one O(8), and one O(9) atom. In the seventh Co site, Co(7) is bonded in a 5-coordinate geometry to one O(11), one O(13), one O(16), one O(3), and one O(6) atom. In the eighth Co site, Co(8) is bonded in a square co-planar geometry to two equivalent O(12) and two equivalent O(9) atoms. In the ninth Co site, Co(9) is bonded in a distorted see-saw-like geometry to one O(13), one O(14), one O(15), and one O(7) atom. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Co(2), one Co(6), and one O(6) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Na(1), one Co(1), one Co(3), and one O(7) atom. In the third O site, O(3) is bonded in a trigonal non-coplanar geometry to one Co(1), one Co(3), and one Co(7) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Na(1), one Co(5), and one O(5) atom. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to one Co(1) and one O(4) atom. In the sixth O site, O(6) is bonded to one Na(1), one Co(3), one Co(7), and one O(1) atom to form distorted ONaCo2O trigonal pyramids that share corners with two equivalent O(13)Co4 tetrahedra,  a cornercorner with one Co(2)O5 trigonal bipyramid, and  an edgeedge with one O(11)NaCo3 tetrahedra. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Na(1), one Co(9), and one O(2) atom. In the eighth O site, O(8) is bonded in a distorted rectangular see-saw-like geometry to one Co(3), one Co(4), one Co(5), and one Co(6) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Co(2), one Co(6), and one Co(8) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Co(3), one Co(6), and one O(16) atom. In the eleventh O site, O(11) is bonded to one Na(1), one Co(1), one Co(5), and one Co(7) atom to form ONaCo3 tetrahedra that share  a cornercorner with one O(13)Co4 tetrahedra and  an edgeedge with one O(6)NaCo2O trigonal pyramid. In the twelfth O site, O(12) is bonded in a distorted T-shaped geometry to one Co(2), one Co(4), and one Co(8) atom. In the thirteenth O site, O(13) is bonded to one Co(2), one Co(3), one Co(7), and one Co(9) atom to form OCo4 tetrahedra that share  a cornercorner with one O(11)NaCo3 tetrahedra and corners with two equivalent O(6)NaCo2O trigonal pyramids. In the fourteenth O site, O(14) is bonded in a distorted trigonal planar geometry to one Na(1), one Co(1), and one Co(9) atom. In the fifteenth O site, O(15) is bonded in a distorted trigonal planar geometry to one Co(1), one Co(5), and one Co(9) atom. In the sixteenth O site, O(16) is bonded in a distorted trigonal planar geometry to one Co(2), one Co(7), and one O(10) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na(CoO2)8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.711
_cell_length_b   7.177
_cell_length_c   12.220
_cell_angle_alpha   78.077
_cell_angle_beta   86.955
_cell_angle_gamma   77.054
_symmetry_Int_Tables_number   1
_cell_volume   561.218
_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  0.617  0.148  0.091  1.0
  Na  Na1  1  0.383  0.852  0.909  1.0
  Co  Co2  1  0.873  0.281  0.864  1.0
  Co  Co3  1  0.792  0.733  0.633  1.0
  Co  Co4  1  0.650  0.130  0.704  1.0
  Co  Co5  1  0.500  0.500  0.500  1.0
  Co  Co6  1  0.285  0.354  0.816  1.0
  Co  Co7  1  0.297  0.677  0.640  1.0
  Co  Co8  1  0.350  0.870  0.296  1.0
  Co  Co9  1  0.208  0.267  0.367  1.0
  Co  Co10  1  0.110  0.096  0.681  1.0
  Co  Co11  1  0.000  0.500  0.500  1.0
  Co  Co12  1  0.060  0.251  0.122  1.0
  Co  Co13  1  0.127  0.719  0.136  1.0
  Co  Co14  1  0.890  0.904  0.319  1.0
  Co  Co15  1  0.703  0.323  0.360  1.0
  Co  Co16  1  0.715  0.646  0.184  1.0
  Co  Co17  1  0.940  0.749  0.878  1.0
  O  O18  1  0.484  0.213  0.318  1.0
  O  O19  1  0.348  0.901  0.122  1.0
  O  O20  1  0.848  0.266  0.711  1.0
  O  O21  1  0.563  0.523  0.109  1.0
  O  O22  1  0.634  0.488  0.869  1.0
  O  O23  1  0.439  0.984  0.702  1.0
  O  O24  1  0.304  0.101  0.070  1.0
  O  O25  1  0.562  0.623  0.325  1.0
  O  O26  1  0.438  0.377  0.675  1.0
  O  O27  1  0.696  0.899  0.930  1.0
  O  O28  1  0.561  0.016  0.298  1.0
  O  O29  1  0.944  0.407  0.380  1.0
  O  O30  1  0.152  0.734  0.289  1.0
  O  O31  1  0.366  0.512  0.131  1.0
  O  O32  1  0.437  0.477  0.891  1.0
  O  O33  1  0.652  0.099  0.878  1.0
  O  O34  1  0.245  0.871  0.498  1.0
  O  O35  1  0.847  0.854  0.171  1.0
  O  O36  1  0.732  0.579  0.538  1.0
  O  O37  1  0.119  0.107  0.279  1.0
  O  O38  1  0.904  0.220  0.020  1.0
  O  O39  1  0.516  0.787  0.682  1.0
  O  O40  1  0.980  0.499  0.145  1.0
  O  O41  1  0.811  0.941  0.478  1.0
  O  O42  1  0.020  0.501  0.855  1.0
  O  O43  1  0.189  0.059  0.522  1.0
  O  O44  1  0.096  0.780  0.980  1.0
  O  O45  1  0.881  0.893  0.721  1.0
  O  O46  1  0.268  0.421  0.462  1.0
  O  O47  1  0.153  0.146  0.829  1.0
  O  O48  1  0.755  0.129  0.502  1.0
  O  O49  1  0.056  0.593  0.620  1.0
[/CIF]
.