The compound described by Na3(CoO2)5 crystallizes in the triclinic P1 space group. There are six inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to one O(1), one O(11), one O(13), one O(15), one O(3), and one O(9) atom. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to one O(10), one O(12), one O(14), one O(16), one O(2), and one O(4) atom. In the third Na site, Na(3) is bonded in a 6-coordinate geometry to one O(13), one O(17), one O(19), one O(5), one O(7), and one O(9) atom. In the fourth Na site, Na(4) is bonded in a 6-coordinate geometry to one O(10), one O(14), one O(18), one O(20), one O(6), and one O(8) atom. In the fifth Na site, Na(5) is bonded in a 6-coordinate geometry to one O(11), one O(15), one O(17), one O(19), one O(5), and one O(7) atom. In the sixth Na site, Na(6) is bonded in a 6-coordinate geometry to one O(12), one O(16), one O(18), one O(20), one O(6), and one O(8) atom. There are ten inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(10), one O(12), one O(13), one O(15), one O(2), and one O(3) atom to form edge-sharing CoO6 octahedra. In the second Co site, Co(2) is bonded to one O(10), one O(13), one O(19), one O(2), one O(3), and one O(6) atom to form edge-sharing CoO6 octahedra. In the third Co site, Co(3) is bonded to one O(1), one O(14), one O(20), one O(4), one O(5), and one O(9) atom to form edge-sharing CoO6 octahedra. In the fourth Co site, Co(4) is bonded to one O(12), one O(15), one O(17), one O(2), one O(3), and one O(8) atom to form edge-sharing CoO6 octahedra. In the fifth Co site, Co(5) is bonded to one O(1), one O(11), one O(16), one O(18), one O(4), and one O(7) atom to form edge-sharing CoO6 octahedra. In the sixth Co site, Co(6) is bonded to one O(1), one O(11), one O(14), one O(16), one O(4), and one O(9) atom to form edge-sharing CoO6 octahedra. In the seventh Co site, Co(7) is bonded to one O(14), one O(18), one O(20), one O(5), one O(7), and one O(9) atom to form edge-sharing CoO6 octahedra. In the eighth Co site, Co(8) is bonded to one O(10), one O(13), one O(17), one O(19), one O(6), and one O(8) atom to form edge-sharing CoO6 octahedra. In the ninth Co site, Co(9) is bonded to one O(11), one O(16), one O(18), one O(20), one O(5), and one O(7) atom to form edge-sharing CoO6 octahedra. In the tenth Co site, Co(10) is bonded to one O(12), one O(15), one O(17), one O(19), one O(6), and one O(8) atom to form edge-sharing CoO6 octahedra. There are twenty inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), one Co(3), one Co(5), and one Co(6) atom to form distorted ONaCo3 trigonal pyramids that share  a cornercorner with one O(11)Na2Co3 square pyramid,  a cornercorner with one O(5)Na2Co3 square pyramid,  a cornercorner with one O(7)Na2Co3 square pyramid,  a cornercorner with one O(9)Na2Co3 square pyramid,  a cornercorner with one O(18)Na2Co3 trigonal bipyramid,  a cornercorner with one O(20)Na2Co3 trigonal bipyramid,  a cornercorner with one O(3)NaCo3 trigonal pyramid,  a cornercorner with one O(4)NaCo3 trigonal pyramid,  an edgeedge with one O(11)Na2Co3 square pyramid,  an edgeedge with one O(9)Na2Co3 square pyramid, and  an edgeedge with one O(4)NaCo3 trigonal pyramid. In the second O site, O(2) is bonded to one Na(2), one Co(1), one Co(2), and one Co(4) atom to form distorted ONaCo3 trigonal pyramids that share  a cornercorner with one O(10)Na2Co3 square pyramid,  a cornercorner with one O(12)Na2Co3 square pyramid,  a cornercorner with one O(6)Na2Co3 square pyramid,  a cornercorner with one O(8)Na2Co3 square pyramid,  a cornercorner with one O(3)NaCo3 trigonal pyramid,  a cornercorner with one O(4)NaCo3 trigonal pyramid,  an edgeedge with one O(10)Na2Co3 square pyramid,  an edgeedge with one O(12)Na2Co3 square pyramid, and  an edgeedge with one O(3)NaCo3 trigonal pyramid. In the third O site, O(3) is bonded to one Na(1), one Co(1), one Co(2), and one Co(4) atom to form distorted ONaCo3 trigonal pyramids that share  a cornercorner with one O(11)Na2Co3 square pyramid,  a cornercorner with one O(6)Na2Co3 square pyramid,  a cornercorner with one O(8)Na2Co3 square pyramid,  a cornercorner with one O(9)Na2Co3 square pyramid,  a cornercorner with one O(1)NaCo3 trigonal pyramid,  a cornercorner with one O(2)NaCo3 trigonal pyramid,  an edgeedge with one O(10)Na2Co3 square pyramid,  an edgeedge with one O(12)Na2Co3 square pyramid, and  an edgeedge with one O(2)NaCo3 trigonal pyramid. In the fourth O site, O(4) is bonded to one Na(2), one Co(3), one Co(5), and one Co(6) atom to form distorted ONaCo3 trigonal pyramids that share  a cornercorner with one O(10)Na2Co3 square pyramid,  a cornercorner with one O(12)Na2Co3 square pyramid,  a cornercorner with one O(5)Na2Co3 square pyramid,  a cornercorner with one O(7)Na2Co3 square pyramid,  a cornercorner with one O(18)Na2Co3 trigonal bipyramid,  a cornercorner with one O(20)Na2Co3 trigonal bipyramid,  a cornercorner with one O(1)NaCo3 trigonal pyramid,  a cornercorner with one O(2)NaCo3 trigonal pyramid,  an edgeedge with one O(11)Na2Co3 square pyramid,  an edgeedge with one O(9)Na2Co3 square pyramid, and  an edgeedge with one O(1)NaCo3 trigonal pyramid. In the fifth O site, O(5) is bonded to one Na(3), one Na(5), one Co(3), one Co(7), and one Co(9) atom to form ONa2Co3 square pyramids that share  a cornercorner with one O(9)Na2Co3 square pyramid,  a cornercorner with one O(20)Na2Co3 trigonal bipyramid,  a cornercorner with one O(1)NaCo3 trigonal pyramid,  a cornercorner with one O(4)NaCo3 trigonal pyramid,  an edgeedge with one O(11)Na2Co3 square pyramid,  an edgeedge with one O(9)Na2Co3 square pyramid, edges with two equivalent O(7)Na2Co3 square pyramids,  an edgeedge with one O(18)Na2Co3 trigonal bipyramid, and  an edgeedge with one O(20)Na2Co3 trigonal bipyramid. In the sixth O site, O(6) is bonded to one Na(4), one Na(6), one Co(10), one Co(2), and one Co(8) atom to form ONa2Co3 square pyramids that share  a cornercorner with one O(10)Na2Co3 square pyramid, corners with two equivalent O(18)Na2Co3 trigonal bipyramids,  a cornercorner with one O(2)NaCo3 trigonal pyramid,  a cornercorner with one O(3)NaCo3 trigonal pyramid,  an edgeedge with one O(10)Na2Co3 square pyramid,  an edgeedge with one O(12)Na2Co3 square pyramid, edges with two equivalent O(8)Na2Co3 square pyramids, and  an edgeedge with one O(20)Na2Co3 trigonal bipyramid. In the seventh O site, O(7) is bonded to one Na(3), one Na(5), one Co(5), one Co(7), and one Co(9) atom to form ONa2Co3 square pyramids that share  a cornercorner with one O(11)Na2Co3 square pyramid,  a cornercorner with one O(18)Na2Co3 trigonal bipyramid,  a cornercorner with one O(1)NaCo3 trigonal pyramid,  a cornercorner with one O(4)NaCo3 trigonal pyramid,  an edgeedge with one O(11)Na2Co3 square pyramid,  an edgeedge with one O(9)Na2Co3 square pyramid, edges with two equivalent O(5)Na2Co3 square pyramids,  an edgeedge with one O(18)Na2Co3 trigonal bipyramid, and  an edgeedge with one O(20)Na2Co3 trigonal bipyramid. In the eighth O site, O(8) is bonded to one Na(4), one Na(6), one Co(10), one Co(4), and one Co(8) atom to form ONa2Co3 square pyramids that share  a cornercorner with one O(12)Na2Co3 square pyramid, corners with two equivalent O(20)Na2Co3 trigonal bipyramids,  a cornercorner with one O(2)NaCo3 trigonal pyramid,  a cornercorner with one O(3)NaCo3 trigonal pyramid,  an edgeedge with one O(10)Na2Co3 square pyramid,  an edgeedge with one O(12)Na2Co3 square pyramid, edges with two equivalent O(6)Na2Co3 square pyramids, and  an edgeedge with one O(18)Na2Co3 trigonal bipyramid. In the ninth O site, O(9) is bonded to one Na(1), one Na(3), one Co(3), one Co(6), and one Co(7) atom to form ONa2Co3 square pyramids that share  a cornercorner with one O(5)Na2Co3 square pyramid,  a cornercorner with one O(18)Na2Co3 trigonal bipyramid,  a cornercorner with one O(1)NaCo3 trigonal pyramid,  a cornercorner with one O(3)NaCo3 trigonal pyramid,  an edgeedge with one O(11)Na2Co3 square pyramid,  an edgeedge with one O(5)Na2Co3 square pyramid,  an edgeedge with one O(7)Na2Co3 square pyramid,  an edgeedge with one O(20)Na2Co3 trigonal bipyramid,  an edgeedge with one O(1)NaCo3 trigonal pyramid, and  an edgeedge with one O(4)NaCo3 trigonal pyramid. In the tenth O site, O(10) is bonded to one Na(2), one Na(4), one Co(1), one Co(2), and one Co(8) atom to form ONa2Co3 square pyramids that share  a cornercorner with one O(6)Na2Co3 square pyramid,  a cornercorner with one O(18)Na2Co3 trigonal bipyramid,  a cornercorner with one O(20)Na2Co3 trigonal bipyramid,  a cornercorner with one O(2)NaCo3 trigonal pyramid,  a cornercorner with one O(4)NaCo3 trigonal pyramid,  an edgeedge with one O(12)Na2Co3 square pyramid,  an edgeedge with one O(6)Na2Co3 square pyramid,  an edgeedge with one O(8)Na2Co3 square pyramid,  an edgeedge with one O(2)NaCo3 trigonal pyramid, and  an edgeedge with one O(3)NaCo3 trigonal pyramid. In the eleventh O site, O(11) is bonded to one Na(1), one Na(5), one Co(5), one Co(6), and one Co(9) atom to form ONa2Co3 square pyramids that share  a cornercorner with one O(7)Na2Co3 square pyramid,  a cornercorner with one O(20)Na2Co3 trigonal bipyramid,  a cornercorner with one O(1)NaCo3 trigonal pyramid,  a cornercorner with one O(3)NaCo3 trigonal pyramid,  an edgeedge with one O(5)Na2Co3 square pyramid,  an edgeedge with one O(7)Na2Co3 square pyramid,  an edgeedge with one O(9)Na2Co3 square pyramid,  an edgeedge with one O(18)Na2Co3 trigonal bipyramid,  an edgeedge with one O(1)NaCo3 trigonal pyramid, and  an edgeedge with one O(4)NaCo3 trigonal pyramid. In the twelfth O site, O(12) is bonded to one Na(2), one Na(6), one Co(1), one Co(10), and one Co(4) atom to form ONa2Co3 square pyramids that share  a cornercorner with one O(8)Na2Co3 square pyramid,  a cornercorner with one O(18)Na2Co3 trigonal bipyramid,  a cornercorner with one O(20)Na2Co3 trigonal bipyramid,  a cornercorner with one O(2)NaCo3 trigonal pyramid,  a cornercorner with one O(4)NaCo3 trigonal pyramid,  an edgeedge with one O(10)Na2Co3 square pyramid,  an edgeedge with one O(6)Na2Co3 square pyramid,  an edgeedge with one O(8)Na2Co3 square pyramid,  an edgeedge with one O(2)NaCo3 trigonal pyramid, and  an edgeedge with one O(3)NaCo3 trigonal pyramid. In the thirteenth O site, O(13) is bonded in a 5-coordinate geometry to one Na(1), one Na(3), one Co(1), one Co(2), and one Co(8) atom. In the fourteenth O site, O(14) is bonded in a 5-coordinate geometry to one Na(2), one Na(4), one Co(3), one Co(6), and one Co(7) atom. In the fifteenth O site, O(15) is bonded in a 5-coordinate geometry to one Na(1), one Na(5), one Co(1), one Co(10), and one Co(4) atom. In the sixteenth O site, O(16) is bonded in a 5-coordinate geometry to one Na(2), one Na(6), one Co(5), one Co(6), and one Co(9) atom. In the seventeenth O site, O(17) is bonded in a 5-coordinate geometry to one Na(3), one Na(5), one Co(10), one Co(4), and one Co(8) atom. In the eighteenth O site, O(18) is bonded to one Na(4), one Na(6), one Co(5), one Co(7), and one Co(9) atom to form distorted ONa2Co3 trigonal bipyramids that share  a cornercorner with one O(10)Na2Co3 square pyramid,  a cornercorner with one O(12)Na2Co3 square pyramid,  a cornercorner with one O(7)Na2Co3 square pyramid,  a cornercorner with one O(9)Na2Co3 square pyramid, corners with two equivalent O(6)Na2Co3 square pyramids,  a cornercorner with one O(1)NaCo3 trigonal pyramid,  a cornercorner with one O(4)NaCo3 trigonal pyramid,  an edgeedge with one O(11)Na2Co3 square pyramid,  an edgeedge with one O(5)Na2Co3 square pyramid,  an edgeedge with one O(7)Na2Co3 square pyramid,  an edgeedge with one O(8)Na2Co3 square pyramid, and edges with two equivalent O(20)Na2Co3 trigonal bipyramids. In the nineteenth O site, O(19) is bonded in a 5-coordinate geometry to one Na(3), one Na(5), one Co(10), one Co(2), and one Co(8) atom. In the twentieth O site, O(20) is bonded to one Na(4), one Na(6), one Co(3), one Co(7), and one Co(9) atom to form distorted ONa2Co3 trigonal bipyramids that share  a cornercorner with one O(10)Na2Co3 square pyramid,  a cornercorner with one O(11)Na2Co3 square pyramid,  a cornercorner with one O(12)Na2Co3 square pyramid,  a cornercorner with one O(5)Na2Co3 square pyramid, corners with two equivalent O(8)Na2Co3 square pyramids,  a cornercorner with one O(1)NaCo3 trigonal pyramid,  a cornercorner with one O(4)NaCo3 trigonal pyramid,  an edgeedge with one O(5)Na2Co3 square pyramid,  an edgeedge with one O(6)Na2Co3 square pyramid,  an edgeedge with one O(7)Na2Co3 square pyramid,  an edgeedge with one O(9)Na2Co3 square pyramid, and edges with two equivalent O(18)Na2Co3 trigonal bipyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na3(CoO2)5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.998
_cell_length_b   11.237
_cell_length_c   7.579
_cell_angle_alpha   86.956
_cell_angle_beta   108.792
_cell_angle_gamma   98.618
_symmetry_Int_Tables_number   1
_cell_volume   398.416
_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  0.823  0.251  0.799  1.0
  Na  Na1  1  0.313  0.749  0.801  1.0
  Na  Na2  1  0.999  0.247  0.195  1.0
  Na  Na3  1  0.522  0.747  0.198  1.0
  Na  Na4  1  0.601  0.250  0.399  1.0
  Na  Na5  1  0.122  0.747  0.403  1.0
  Co  Co6  1  0.903  0.505  0.801  1.0
  Co  Co7  1  0.493  0.496  0.998  1.0
  Co  Co8  1  0.998  0.996  0.000  1.0
  Co  Co9  1  0.301  0.500  0.600  1.0
  Co  Co10  1  0.802  0.998  0.602  1.0
  Co  Co11  1  0.406  0.005  0.801  1.0
  Co  Co12  1  0.599  0.003  0.200  1.0
  Co  Co13  1  0.097  0.501  0.199  1.0
  Co  Co14  1  0.204  0.003  0.401  1.0
  Co  Co15  1  0.705  0.506  0.405  1.0
  O  O16  1  0.090  0.086  0.801  1.0
  O  O17  1  0.591  0.586  0.806  1.0
  O  O18  1  0.204  0.415  0.802  1.0
  O  O19  1  0.705  0.914  0.802  1.0
  O  O20  1  0.272  0.096  0.192  1.0
  O  O21  1  0.792  0.587  0.198  1.0
  O  O22  1  0.878  0.092  0.400  1.0
  O  O23  1  0.379  0.592  0.391  1.0
  O  O24  1  0.707  0.090  0.997  1.0
  O  O25  1  0.203  0.589  0.003  1.0
  O  O26  1  0.523  0.094  0.606  1.0
  O  O27  1  0.017  0.595  0.607  1.0
  O  O28  1  0.805  0.412  0.002  1.0
  O  O29  1  0.309  0.914  0.001  1.0
  O  O30  1  0.615  0.416  0.600  1.0
  O  O31  1  0.108  0.912  0.605  1.0
  O  O32  1  0.009  0.410  0.396  1.0
  O  O33  1  0.520  0.907  0.407  1.0
  O  O34  1  0.381  0.409  0.191  1.0
  O  O35  1  0.909  0.902  0.191  1.0
[/CIF]
.
The compound described by Na3(CoO2)5 crystallizes in the triclinic P1 space group. There are six inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to one O(1), one O(11), one O(13), one O(15), one O(3), and one O(9) atom. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to one O(10), one O(12), one O(14), one O(16), one O(2), and one O(4) atom. In the third Na site, Na(3) is bonded in a 6-coordinate geometry to one O(13), one O(17), one O(19), one O(5), one O(7), and one O(9) atom. In the fourth Na site, Na(4) is bonded in a 6-coordinate geometry to one O(10), one O(14), one O(18), one O(20), one O(6), and one O(8) atom. In the fifth Na site, Na(5) is bonded in a 6-coordinate geometry to one O(11), one O(15), one O(17), one O(19), one O(5), and one O(7) atom. In the sixth Na site, Na(6) is bonded in a 6-coordinate geometry to one O(12), one O(16), one O(18), one O(20), one O(6), and one O(8) atom. There are ten inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(10), one O(12), one O(13), one O(15), one O(2), and one O(3) atom to form edge-sharing CoO6 octahedra. In the second Co site, Co(2) is bonded to one O(10), one O(13), one O(19), one O(2), one O(3), and one O(6) atom to form edge-sharing CoO6 octahedra. In the third Co site, Co(3) is bonded to one O(1), one O(14), one O(20), one O(4), one O(5), and one O(9) atom to form edge-sharing CoO6 octahedra. In the fourth Co site, Co(4) is bonded to one O(12), one O(15), one O(17), one O(2), one O(3), and one O(8) atom to form edge-sharing CoO6 octahedra. In the fifth Co site, Co(5) is bonded to one O(1), one O(11), one O(16), one O(18), one O(4), and one O(7) atom to form edge-sharing CoO6 octahedra. In the sixth Co site, Co(6) is bonded to one O(1), one O(11), one O(14), one O(16), one O(4), and one O(9) atom to form edge-sharing CoO6 octahedra. In the seventh Co site, Co(7) is bonded to one O(14), one O(18), one O(20), one O(5), one O(7), and one O(9) atom to form edge-sharing CoO6 octahedra. In the eighth Co site, Co(8) is bonded to one O(10), one O(13), one O(17), one O(19), one O(6), and one O(8) atom to form edge-sharing CoO6 octahedra. In the ninth Co site, Co(9) is bonded to one O(11), one O(16), one O(18), one O(20), one O(5), and one O(7) atom to form edge-sharing CoO6 octahedra. In the tenth Co site, Co(10) is bonded to one O(12), one O(15), one O(17), one O(19), one O(6), and one O(8) atom to form edge-sharing CoO6 octahedra. There are twenty inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), one Co(3), one Co(5), and one Co(6) atom to form distorted ONaCo3 trigonal pyramids that share  a cornercorner with one O(11)Na2Co3 square pyramid,  a cornercorner with one O(5)Na2Co3 square pyramid,  a cornercorner with one O(7)Na2Co3 square pyramid,  a cornercorner with one O(9)Na2Co3 square pyramid,  a cornercorner with one O(18)Na2Co3 trigonal bipyramid,  a cornercorner with one O(20)Na2Co3 trigonal bipyramid,  a cornercorner with one O(3)NaCo3 trigonal pyramid,  a cornercorner with one O(4)NaCo3 trigonal pyramid,  an edgeedge with one O(11)Na2Co3 square pyramid,  an edgeedge with one O(9)Na2Co3 square pyramid, and  an edgeedge with one O(4)NaCo3 trigonal pyramid. In the second O site, O(2) is bonded to one Na(2), one Co(1), one Co(2), and one Co(4) atom to form distorted ONaCo3 trigonal pyramids that share  a cornercorner with one O(10)Na2Co3 square pyramid,  a cornercorner with one O(12)Na2Co3 square pyramid,  a cornercorner with one O(6)Na2Co3 square pyramid,  a cornercorner with one O(8)Na2Co3 square pyramid,  a cornercorner with one O(3)NaCo3 trigonal pyramid,  a cornercorner with one O(4)NaCo3 trigonal pyramid,  an edgeedge with one O(10)Na2Co3 square pyramid,  an edgeedge with one O(12)Na2Co3 square pyramid, and  an edgeedge with one O(3)NaCo3 trigonal pyramid. In the third O site, O(3) is bonded to one Na(1), one Co(1), one Co(2), and one Co(4) atom to form distorted ONaCo3 trigonal pyramids that share  a cornercorner with one O(11)Na2Co3 square pyramid,  a cornercorner with one O(6)Na2Co3 square pyramid,  a cornercorner with one O(8)Na2Co3 square pyramid,  a cornercorner with one O(9)Na2Co3 square pyramid,  a cornercorner with one O(1)NaCo3 trigonal pyramid,  a cornercorner with one O(2)NaCo3 trigonal pyramid,  an edgeedge with one O(10)Na2Co3 square pyramid,  an edgeedge with one O(12)Na2Co3 square pyramid, and  an edgeedge with one O(2)NaCo3 trigonal pyramid. In the fourth O site, O(4) is bonded to one Na(2), one Co(3), one Co(5), and one Co(6) atom to form distorted ONaCo3 trigonal pyramids that share  a cornercorner with one O(10)Na2Co3 square pyramid,  a cornercorner with one O(12)Na2Co3 square pyramid,  a cornercorner with one O(5)Na2Co3 square pyramid,  a cornercorner with one O(7)Na2Co3 square pyramid,  a cornercorner with one O(18)Na2Co3 trigonal bipyramid,  a cornercorner with one O(20)Na2Co3 trigonal bipyramid,  a cornercorner with one O(1)NaCo3 trigonal pyramid,  a cornercorner with one O(2)NaCo3 trigonal pyramid,  an edgeedge with one O(11)Na2Co3 square pyramid,  an edgeedge with one O(9)Na2Co3 square pyramid, and  an edgeedge with one O(1)NaCo3 trigonal pyramid. In the fifth O site, O(5) is bonded to one Na(3), one Na(5), one Co(3), one Co(7), and one Co(9) atom to form ONa2Co3 square pyramids that share  a cornercorner with one O(9)Na2Co3 square pyramid,  a cornercorner with one O(20)Na2Co3 trigonal bipyramid,  a cornercorner with one O(1)NaCo3 trigonal pyramid,  a cornercorner with one O(4)NaCo3 trigonal pyramid,  an edgeedge with one O(11)Na2Co3 square pyramid,  an edgeedge with one O(9)Na2Co3 square pyramid, edges with two equivalent O(7)Na2Co3 square pyramids,  an edgeedge with one O(18)Na2Co3 trigonal bipyramid, and  an edgeedge with one O(20)Na2Co3 trigonal bipyramid. In the sixth O site, O(6) is bonded to one Na(4), one Na(6), one Co(10), one Co(2), and one Co(8) atom to form ONa2Co3 square pyramids that share  a cornercorner with one O(10)Na2Co3 square pyramid, corners with two equivalent O(18)Na2Co3 trigonal bipyramids,  a cornercorner with one O(2)NaCo3 trigonal pyramid,  a cornercorner with one O(3)NaCo3 trigonal pyramid,  an edgeedge with one O(10)Na2Co3 square pyramid,  an edgeedge with one O(12)Na2Co3 square pyramid, edges with two equivalent O(8)Na2Co3 square pyramids, and  an edgeedge with one O(20)Na2Co3 trigonal bipyramid. In the seventh O site, O(7) is bonded to one Na(3), one Na(5), one Co(5), one Co(7), and one Co(9) atom to form ONa2Co3 square pyramids that share  a cornercorner with one O(11)Na2Co3 square pyramid,  a cornercorner with one O(18)Na2Co3 trigonal bipyramid,  a cornercorner with one O(1)NaCo3 trigonal pyramid,  a cornercorner with one O(4)NaCo3 trigonal pyramid,  an edgeedge with one O(11)Na2Co3 square pyramid,  an edgeedge with one O(9)Na2Co3 square pyramid, edges with two equivalent O(5)Na2Co3 square pyramids,  an edgeedge with one O(18)Na2Co3 trigonal bipyramid, and  an edgeedge with one O(20)Na2Co3 trigonal bipyramid. In the eighth O site, O(8) is bonded to one Na(4), one Na(6), one Co(10), one Co(4), and one Co(8) atom to form ONa2Co3 square pyramids that share  a cornercorner with one O(12)Na2Co3 square pyramid, corners with two equivalent O(20)Na2Co3 trigonal bipyramids,  a cornercorner with one O(2)NaCo3 trigonal pyramid,  a cornercorner with one O(3)NaCo3 trigonal pyramid,  an edgeedge with one O(10)Na2Co3 square pyramid,  an edgeedge with one O(12)Na2Co3 square pyramid, edges with two equivalent O(6)Na2Co3 square pyramids, and  an edgeedge with one O(18)Na2Co3 trigonal bipyramid. In the ninth O site, O(9) is bonded to one Na(1), one Na(3), one Co(3), one Co(6), and one Co(7) atom to form ONa2Co3 square pyramids that share  a cornercorner with one O(5)Na2Co3 square pyramid,  a cornercorner with one O(18)Na2Co3 trigonal bipyramid,  a cornercorner with one O(1)NaCo3 trigonal pyramid,  a cornercorner with one O(3)NaCo3 trigonal pyramid,  an edgeedge with one O(11)Na2Co3 square pyramid,  an edgeedge with one O(5)Na2Co3 square pyramid,  an edgeedge with one O(7)Na2Co3 square pyramid,  an edgeedge with one O(20)Na2Co3 trigonal bipyramid,  an edgeedge with one O(1)NaCo3 trigonal pyramid, and  an edgeedge with one O(4)NaCo3 trigonal pyramid. In the tenth O site, O(10) is bonded to one Na(2), one Na(4), one Co(1), one Co(2), and one Co(8) atom to form ONa2Co3 square pyramids that share  a cornercorner with one O(6)Na2Co3 square pyramid,  a cornercorner with one O(18)Na2Co3 trigonal bipyramid,  a cornercorner with one O(20)Na2Co3 trigonal bipyramid,  a cornercorner with one O(2)NaCo3 trigonal pyramid,  a cornercorner with one O(4)NaCo3 trigonal pyramid,  an edgeedge with one O(12)Na2Co3 square pyramid,  an edgeedge with one O(6)Na2Co3 square pyramid,  an edgeedge with one O(8)Na2Co3 square pyramid,  an edgeedge with one O(2)NaCo3 trigonal pyramid, and  an edgeedge with one O(3)NaCo3 trigonal pyramid. In the eleventh O site, O(11) is bonded to one Na(1), one Na(5), one Co(5), one Co(6), and one Co(9) atom to form ONa2Co3 square pyramids that share  a cornercorner with one O(7)Na2Co3 square pyramid,  a cornercorner with one O(20)Na2Co3 trigonal bipyramid,  a cornercorner with one O(1)NaCo3 trigonal pyramid,  a cornercorner with one O(3)NaCo3 trigonal pyramid,  an edgeedge with one O(5)Na2Co3 square pyramid,  an edgeedge with one O(7)Na2Co3 square pyramid,  an edgeedge with one O(9)Na2Co3 square pyramid,  an edgeedge with one O(18)Na2Co3 trigonal bipyramid,  an edgeedge with one O(1)NaCo3 trigonal pyramid, and  an edgeedge with one O(4)NaCo3 trigonal pyramid. In the twelfth O site, O(12) is bonded to one Na(2), one Na(6), one Co(1), one Co(10), and one Co(4) atom to form ONa2Co3 square pyramids that share  a cornercorner with one O(8)Na2Co3 square pyramid,  a cornercorner with one O(18)Na2Co3 trigonal bipyramid,  a cornercorner with one O(20)Na2Co3 trigonal bipyramid,  a cornercorner with one O(2)NaCo3 trigonal pyramid,  a cornercorner with one O(4)NaCo3 trigonal pyramid,  an edgeedge with one O(10)Na2Co3 square pyramid,  an edgeedge with one O(6)Na2Co3 square pyramid,  an edgeedge with one O(8)Na2Co3 square pyramid,  an edgeedge with one O(2)NaCo3 trigonal pyramid, and  an edgeedge with one O(3)NaCo3 trigonal pyramid. In the thirteenth O site, O(13) is bonded in a 5-coordinate geometry to one Na(1), one Na(3), one Co(1), one Co(2), and one Co(8) atom. In the fourteenth O site, O(14) is bonded in a 5-coordinate geometry to one Na(2), one Na(4), one Co(3), one Co(6), and one Co(7) atom. In the fifteenth O site, O(15) is bonded in a 5-coordinate geometry to one Na(1), one Na(5), one Co(1), one Co(10), and one Co(4) atom. In the sixteenth O site, O(16) is bonded in a 5-coordinate geometry to one Na(2), one Na(6), one Co(5), one Co(6), and one Co(9) atom. In the seventeenth O site, O(17) is bonded in a 5-coordinate geometry to one Na(3), one Na(5), one Co(10), one Co(4), and one Co(8) atom. In the eighteenth O site, O(18) is bonded to one Na(4), one Na(6), one Co(5), one Co(7), and one Co(9) atom to form distorted ONa2Co3 trigonal bipyramids that share  a cornercorner with one O(10)Na2Co3 square pyramid,  a cornercorner with one O(12)Na2Co3 square pyramid,  a cornercorner with one O(7)Na2Co3 square pyramid,  a cornercorner with one O(9)Na2Co3 square pyramid, corners with two equivalent O(6)Na2Co3 square pyramids,  a cornercorner with one O(1)NaCo3 trigonal pyramid,  a cornercorner with one O(4)NaCo3 trigonal pyramid,  an edgeedge with one O(11)Na2Co3 square pyramid,  an edgeedge with one O(5)Na2Co3 square pyramid,  an edgeedge with one O(7)Na2Co3 square pyramid,  an edgeedge with one O(8)Na2Co3 square pyramid, and edges with two equivalent O(20)Na2Co3 trigonal bipyramids. In the nineteenth O site, O(19) is bonded in a 5-coordinate geometry to one Na(3), one Na(5), one Co(10), one Co(2), and one Co(8) atom. In the twentieth O site, O(20) is bonded to one Na(4), one Na(6), one Co(3), one Co(7), and one Co(9) atom to form distorted ONa2Co3 trigonal bipyramids that share  a cornercorner with one O(10)Na2Co3 square pyramid,  a cornercorner with one O(11)Na2Co3 square pyramid,  a cornercorner with one O(12)Na2Co3 square pyramid,  a cornercorner with one O(5)Na2Co3 square pyramid, corners with two equivalent O(8)Na2Co3 square pyramids,  a cornercorner with one O(1)NaCo3 trigonal pyramid,  a cornercorner with one O(4)NaCo3 trigonal pyramid,  an edgeedge with one O(5)Na2Co3 square pyramid,  an edgeedge with one O(6)Na2Co3 square pyramid,  an edgeedge with one O(7)Na2Co3 square pyramid,  an edgeedge with one O(9)Na2Co3 square pyramid, and edges with two equivalent O(18)Na2Co3 trigonal bipyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na3(CoO2)5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.998
_cell_length_b   11.237
_cell_length_c   7.579
_cell_angle_alpha   86.956
_cell_angle_beta   108.792
_cell_angle_gamma   98.618
_symmetry_Int_Tables_number   1
_cell_volume   398.416
_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  0.823  0.251  0.799  1.0
  Na  Na1  1  0.313  0.749  0.801  1.0
  Na  Na2  1  0.999  0.247  0.195  1.0
  Na  Na3  1  0.522  0.747  0.198  1.0
  Na  Na4  1  0.601  0.250  0.399  1.0
  Na  Na5  1  0.122  0.747  0.403  1.0
  Co  Co6  1  0.903  0.505  0.801  1.0
  Co  Co7  1  0.493  0.496  0.998  1.0
  Co  Co8  1  0.998  0.996  0.000  1.0
  Co  Co9  1  0.301  0.500  0.600  1.0
  Co  Co10  1  0.802  0.998  0.602  1.0
  Co  Co11  1  0.406  0.005  0.801  1.0
  Co  Co12  1  0.599  0.003  0.200  1.0
  Co  Co13  1  0.097  0.501  0.199  1.0
  Co  Co14  1  0.204  0.003  0.401  1.0
  Co  Co15  1  0.705  0.506  0.405  1.0
  O  O16  1  0.090  0.086  0.801  1.0
  O  O17  1  0.591  0.586  0.806  1.0
  O  O18  1  0.204  0.415  0.802  1.0
  O  O19  1  0.705  0.914  0.802  1.0
  O  O20  1  0.272  0.096  0.192  1.0
  O  O21  1  0.792  0.587  0.198  1.0
  O  O22  1  0.878  0.092  0.400  1.0
  O  O23  1  0.379  0.592  0.391  1.0
  O  O24  1  0.707  0.090  0.997  1.0
  O  O25  1  0.203  0.589  0.003  1.0
  O  O26  1  0.523  0.094  0.606  1.0
  O  O27  1  0.017  0.595  0.607  1.0
  O  O28  1  0.805  0.412  0.002  1.0
  O  O29  1  0.309  0.914  0.001  1.0
  O  O30  1  0.615  0.416  0.600  1.0
  O  O31  1  0.108  0.912  0.605  1.0
  O  O32  1  0.009  0.410  0.396  1.0
  O  O33  1  0.520  0.907  0.407  1.0
  O  O34  1  0.381  0.409  0.191  1.0
  O  O35  1  0.909  0.902  0.191  1.0
[/CIF]
.