The material described by Na3Mg(CoO2)5 crystallizes in the triclinic P1 space group. There are three inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to one O(1), one O(3), one O(4), one O(5), one O(7), and one O(8) atom. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to one O(4), one O(5), one O(6), one O(7), one O(8), and one O(9) atom. In the third Na site, Na(3) is bonded to one O(1), one O(10), one O(2), one O(3), one O(6), and one O(9) atom to form distorted NaO6 octahedra that share corners with two equivalent Co(4)O6 octahedra, corners with two equivalent Co(5)O6 octahedra, corners with three equivalent Co(3)O6 octahedra, edges with two equivalent Mg(1)O6 octahedra, and  a faceface with one Co(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 34-55°. Mg(1) is bonded to one O(10), one O(2), one O(5), one O(6), one O(8), and one O(9) atom to form distorted MgO6 octahedra that share corners with two equivalent Co(3)O6 octahedra, corners with two equivalent Co(5)O6 octahedra, corners with three equivalent Co(4)O6 octahedra, edges with two equivalent Na(3)O6 octahedra,  a faceface with one Co(3)O6 octahedra, and  a faceface with one Co(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 39-47°. There are five inequivalent Co sites. In the first Co site, Co(1) is bonded in a 5-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(6), and one O(7) atom. In the second Co site, Co(2) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(7) atom. In the third Co site, Co(3) is bonded to one O(10), one O(4), one O(5), one O(6), one O(8), and one O(9) atom to form CoO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra, corners with three equivalent Na(3)O6 octahedra, edges with two equivalent Co(4)O6 octahedra, edges with two equivalent Co(5)O6 octahedra, and  a faceface with one Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 34-50°. In the fourth Co site, Co(4) is bonded to one O(1), one O(4), one O(5), one O(7), one O(8), and one O(9) atom to form distorted CoO6 octahedra that share corners with two equivalent Na(3)O6 octahedra, corners with three equivalent Mg(1)O6 octahedra,  an edgeedge with one Co(5)O6 octahedra, and edges with two equivalent Co(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 39-52°. In the fifth Co site, Co(5) is bonded to one O(10), one O(2), one O(3), one O(6), one O(8), and one O(9) atom to form CoO6 octahedra that share corners with two equivalent Na(3)O6 octahedra, corners with two equivalent Mg(1)O6 octahedra,  an edgeedge with one Co(4)O6 octahedra, edges with two equivalent Co(3)O6 octahedra,  a faceface with one Na(3)O6 octahedra, and  a faceface with one Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 44-55°. There are ten inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), one Na(3), one Co(1), one Co(2), and one Co(4) atom to form distorted ONa2Co3 trigonal bipyramids that share  a cornercorner with one O(4)Na2Co3 trigonal bipyramid,  a cornercorner with one O(2)NaMgCo3 trigonal bipyramid, corners with two equivalent O(10)NaMgCo3 trigonal bipyramids,  an edgeedge with one O(4)Na2Co3 trigonal bipyramid,  an edgeedge with one O(2)NaMgCo3 trigonal bipyramid, and edges with two equivalent O(3)Na2Co3 trigonal bipyramids. In the second O site, O(2) is bonded to one Na(3), one Mg(1), one Co(1), one Co(2), and one Co(5) atom to form distorted ONaMgCo3 trigonal bipyramids that share  a cornercorner with one O(1)Na2Co3 trigonal bipyramid,  a cornercorner with one O(4)Na2Co3 trigonal bipyramid, corners with two equivalent O(3)Na2Co3 trigonal bipyramids, corners with two equivalent O(10)NaMgCo3 trigonal bipyramids,  an edgeedge with one O(1)Na2Co3 trigonal bipyramid,  an edgeedge with one O(3)Na2Co3 trigonal bipyramid, and  an edgeedge with one O(10)NaMgCo3 trigonal bipyramid. In the third O site, O(3) is bonded to one Na(1), one Na(3), one Co(1), one Co(2), and one Co(5) atom to form distorted ONa2Co3 trigonal bipyramids that share  a cornercorner with one O(10)NaMgCo3 trigonal bipyramid, corners with two equivalent O(4)Na2Co3 trigonal bipyramids, corners with two equivalent O(2)NaMgCo3 trigonal bipyramids,  an edgeedge with one O(10)NaMgCo3 trigonal bipyramid,  an edgeedge with one O(2)NaMgCo3 trigonal bipyramid, and edges with two equivalent O(1)Na2Co3 trigonal bipyramids. In the fourth O site, O(4) is bonded to one Na(1), one Na(2), one Co(2), one Co(3), and one Co(4) atom to form distorted ONa2Co3 trigonal bipyramids that share  a cornercorner with one O(1)Na2Co3 trigonal bipyramid,  a cornercorner with one O(10)NaMgCo3 trigonal bipyramid,  a cornercorner with one O(2)NaMgCo3 trigonal bipyramid, corners with two equivalent O(3)Na2Co3 trigonal bipyramids, and  an edgeedge with one O(1)Na2Co3 trigonal bipyramid. In the fifth O site, O(5) is bonded in a 6-coordinate geometry to one Na(1), one Na(2), one Mg(1), one Co(2), one Co(3), and one Co(4) atom. In the sixth O site, O(6) is bonded in a 6-coordinate geometry to one Na(2), one Na(3), one Mg(1), one Co(1), one Co(3), and one Co(5) atom. In the seventh O site, O(7) is bonded in a 5-coordinate geometry to one Na(1), one Na(2), one Co(1), one Co(2), and one Co(4) atom. In the eighth O site, O(8) is bonded in a 6-coordinate geometry to one Na(1), one Na(2), one Mg(1), one Co(3), one Co(4), and one Co(5) atom. In the ninth O site, O(9) is bonded in a 6-coordinate geometry to one Na(2), one Na(3), one Mg(1), one Co(3), one Co(4), and one Co(5) atom. In the tenth O site, O(10) is bonded to one Na(3), one Mg(1), one Co(1), one Co(3), and one Co(5) atom to form distorted ONaMgCo3 trigonal bipyramids that share  a cornercorner with one O(3)Na2Co3 trigonal bipyramid,  a cornercorner with one O(4)Na2Co3 trigonal bipyramid, corners with two equivalent O(1)Na2Co3 trigonal bipyramids, corners with two equivalent O(2)NaMgCo3 trigonal bipyramids,  an edgeedge with one O(3)Na2Co3 trigonal bipyramid, and  an edgeedge with one O(2)NaMgCo3 trigonal bipyramid. is represented by the CIF file [CIF]
data_Na3Mg(CoO2)5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.003
_cell_length_b   7.782
_cell_length_c   5.162
_cell_angle_alpha   75.379
_cell_angle_beta   65.010
_cell_angle_gamma   75.492
_symmetry_Int_Tables_number   1
_cell_volume   208.645
_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  0.510  0.267  0.547  1.0
  Na  Na1  1  0.502  0.451  0.977  1.0
  Na  Na2  1  0.487  0.915  0.828  1.0
  Mg  Mg3  1  0.503  0.701  0.396  1.0
  Co  Co4  1  0.958  0.008  0.999  1.0
  Co  Co5  1  0.029  0.176  0.394  1.0
  Co  Co6  1  0.017  0.597  0.192  1.0
  Co  Co7  1  0.999  0.394  0.807  1.0
  Co  Co8  1  0.998  0.785  0.604  1.0
  O  O9  1  0.181  0.165  0.985  1.0
  O  O10  1  0.219  0.931  0.583  1.0
  O  O11  1  0.819  0.024  0.414  1.0
  O  O12  1  0.179  0.358  0.394  1.0
  O  O13  1  0.782  0.458  0.183  1.0
  O  O14  1  0.242  0.724  0.196  1.0
  O  O15  1  0.812  0.214  0.786  1.0
  O  O16  1  0.223  0.563  0.753  1.0
  O  O17  1  0.773  0.643  0.601  1.0
  O  O18  1  0.790  0.820  0.039  1.0
[/CIF]
.
The material described by Na3Mg(CoO2)5 crystallizes in the triclinic P1 space group. There are three inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to one O(1), one O(3), one O(4), one O(5), one O(7), and one O(8) atom. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to one O(4), one O(5), one O(6), one O(7), one O(8), and one O(9) atom. In the third Na site, Na(3) is bonded to one O(1), one O(10), one O(2), one O(3), one O(6), and one O(9) atom to form distorted NaO6 octahedra that share corners with two equivalent Co(4)O6 octahedra, corners with two equivalent Co(5)O6 octahedra, corners with three equivalent Co(3)O6 octahedra, edges with two equivalent Mg(1)O6 octahedra, and  a faceface with one Co(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 34-55°. Mg(1) is bonded to one O(10), one O(2), one O(5), one O(6), one O(8), and one O(9) atom to form distorted MgO6 octahedra that share corners with two equivalent Co(3)O6 octahedra, corners with two equivalent Co(5)O6 octahedra, corners with three equivalent Co(4)O6 octahedra, edges with two equivalent Na(3)O6 octahedra,  a faceface with one Co(3)O6 octahedra, and  a faceface with one Co(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 39-47°. There are five inequivalent Co sites. In the first Co site, Co(1) is bonded in a 5-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(6), and one O(7) atom. In the second Co site, Co(2) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(7) atom. In the third Co site, Co(3) is bonded to one O(10), one O(4), one O(5), one O(6), one O(8), and one O(9) atom to form CoO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra, corners with three equivalent Na(3)O6 octahedra, edges with two equivalent Co(4)O6 octahedra, edges with two equivalent Co(5)O6 octahedra, and  a faceface with one Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 34-50°. In the fourth Co site, Co(4) is bonded to one O(1), one O(4), one O(5), one O(7), one O(8), and one O(9) atom to form distorted CoO6 octahedra that share corners with two equivalent Na(3)O6 octahedra, corners with three equivalent Mg(1)O6 octahedra,  an edgeedge with one Co(5)O6 octahedra, and edges with two equivalent Co(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 39-52°. In the fifth Co site, Co(5) is bonded to one O(10), one O(2), one O(3), one O(6), one O(8), and one O(9) atom to form CoO6 octahedra that share corners with two equivalent Na(3)O6 octahedra, corners with two equivalent Mg(1)O6 octahedra,  an edgeedge with one Co(4)O6 octahedra, edges with two equivalent Co(3)O6 octahedra,  a faceface with one Na(3)O6 octahedra, and  a faceface with one Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 44-55°. There are ten inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), one Na(3), one Co(1), one Co(2), and one Co(4) atom to form distorted ONa2Co3 trigonal bipyramids that share  a cornercorner with one O(4)Na2Co3 trigonal bipyramid,  a cornercorner with one O(2)NaMgCo3 trigonal bipyramid, corners with two equivalent O(10)NaMgCo3 trigonal bipyramids,  an edgeedge with one O(4)Na2Co3 trigonal bipyramid,  an edgeedge with one O(2)NaMgCo3 trigonal bipyramid, and edges with two equivalent O(3)Na2Co3 trigonal bipyramids. In the second O site, O(2) is bonded to one Na(3), one Mg(1), one Co(1), one Co(2), and one Co(5) atom to form distorted ONaMgCo3 trigonal bipyramids that share  a cornercorner with one O(1)Na2Co3 trigonal bipyramid,  a cornercorner with one O(4)Na2Co3 trigonal bipyramid, corners with two equivalent O(3)Na2Co3 trigonal bipyramids, corners with two equivalent O(10)NaMgCo3 trigonal bipyramids,  an edgeedge with one O(1)Na2Co3 trigonal bipyramid,  an edgeedge with one O(3)Na2Co3 trigonal bipyramid, and  an edgeedge with one O(10)NaMgCo3 trigonal bipyramid. In the third O site, O(3) is bonded to one Na(1), one Na(3), one Co(1), one Co(2), and one Co(5) atom to form distorted ONa2Co3 trigonal bipyramids that share  a cornercorner with one O(10)NaMgCo3 trigonal bipyramid, corners with two equivalent O(4)Na2Co3 trigonal bipyramids, corners with two equivalent O(2)NaMgCo3 trigonal bipyramids,  an edgeedge with one O(10)NaMgCo3 trigonal bipyramid,  an edgeedge with one O(2)NaMgCo3 trigonal bipyramid, and edges with two equivalent O(1)Na2Co3 trigonal bipyramids. In the fourth O site, O(4) is bonded to one Na(1), one Na(2), one Co(2), one Co(3), and one Co(4) atom to form distorted ONa2Co3 trigonal bipyramids that share  a cornercorner with one O(1)Na2Co3 trigonal bipyramid,  a cornercorner with one O(10)NaMgCo3 trigonal bipyramid,  a cornercorner with one O(2)NaMgCo3 trigonal bipyramid, corners with two equivalent O(3)Na2Co3 trigonal bipyramids, and  an edgeedge with one O(1)Na2Co3 trigonal bipyramid. In the fifth O site, O(5) is bonded in a 6-coordinate geometry to one Na(1), one Na(2), one Mg(1), one Co(2), one Co(3), and one Co(4) atom. In the sixth O site, O(6) is bonded in a 6-coordinate geometry to one Na(2), one Na(3), one Mg(1), one Co(1), one Co(3), and one Co(5) atom. In the seventh O site, O(7) is bonded in a 5-coordinate geometry to one Na(1), one Na(2), one Co(1), one Co(2), and one Co(4) atom. In the eighth O site, O(8) is bonded in a 6-coordinate geometry to one Na(1), one Na(2), one Mg(1), one Co(3), one Co(4), and one Co(5) atom. In the ninth O site, O(9) is bonded in a 6-coordinate geometry to one Na(2), one Na(3), one Mg(1), one Co(3), one Co(4), and one Co(5) atom. In the tenth O site, O(10) is bonded to one Na(3), one Mg(1), one Co(1), one Co(3), and one Co(5) atom to form distorted ONaMgCo3 trigonal bipyramids that share  a cornercorner with one O(3)Na2Co3 trigonal bipyramid,  a cornercorner with one O(4)Na2Co3 trigonal bipyramid, corners with two equivalent O(1)Na2Co3 trigonal bipyramids, corners with two equivalent O(2)NaMgCo3 trigonal bipyramids,  an edgeedge with one O(3)Na2Co3 trigonal bipyramid, and  an edgeedge with one O(2)NaMgCo3 trigonal bipyramid. is represented by the CIF file [CIF]
data_Na3Mg(CoO2)5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.003
_cell_length_b   7.782
_cell_length_c   5.162
_cell_angle_alpha   75.379
_cell_angle_beta   65.010
_cell_angle_gamma   75.492
_symmetry_Int_Tables_number   1
_cell_volume   208.645
_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  0.510  0.267  0.547  1.0
  Na  Na1  1  0.502  0.451  0.977  1.0
  Na  Na2  1  0.487  0.915  0.828  1.0
  Mg  Mg3  1  0.503  0.701  0.396  1.0
  Co  Co4  1  0.958  0.008  0.999  1.0
  Co  Co5  1  0.029  0.176  0.394  1.0
  Co  Co6  1  0.017  0.597  0.192  1.0
  Co  Co7  1  0.999  0.394  0.807  1.0
  Co  Co8  1  0.998  0.785  0.604  1.0
  O  O9  1  0.181  0.165  0.985  1.0
  O  O10  1  0.219  0.931  0.583  1.0
  O  O11  1  0.819  0.024  0.414  1.0
  O  O12  1  0.179  0.358  0.394  1.0
  O  O13  1  0.782  0.458  0.183  1.0
  O  O14  1  0.242  0.724  0.196  1.0
  O  O15  1  0.812  0.214  0.786  1.0
  O  O16  1  0.223  0.563  0.753  1.0
  O  O17  1  0.773  0.643  0.601  1.0
  O  O18  1  0.790  0.820  0.039  1.0
[/CIF]
.