The structure described by Na7(NiO2)10 crystallizes in the triclinic P-1 space group. There are four inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to one O(3), one O(9), two equivalent O(1), and two equivalent O(4) atoms. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to one O(10), one O(5), two equivalent O(2), and two equivalent O(6) atoms. In the third Na site, Na(3) is bonded to two equivalent O(2) and four equivalent O(5) atoms to form distorted NaO6 octahedra that share corners with two equivalent Ni(3)O6 octahedra, corners with four equivalent Ni(1)O6 octahedra, edges with two equivalent Na(3)O6 octahedra, edges with two equivalent Ni(1)O6 octahedra, and edges with four equivalent Ni(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 8-12°. In the fourth Na site, Na(4) is bonded in a 6-coordinate geometry to one O(1), one O(8), two equivalent O(7), and two equivalent O(9) atoms. There are six inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to one O(3), one O(6), two equivalent O(4), and two equivalent O(5) atoms to form NiO6 octahedra that share corners with two equivalent Na(3)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra, edges with two equivalent Ni(1)O6 octahedra, edges with two equivalent Ni(2)O6 octahedra, and edges with two equivalent Ni(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 10-12°. In the second Ni site, Ni(2) is bonded to one O(1), one O(5), two equivalent O(2), and two equivalent O(3) atoms to form NiO6 octahedra that share edges with two equivalent Na(3)O6 octahedra, edges with two equivalent Ni(1)O6 octahedra, edges with two equivalent Ni(2)O6 octahedra, and edges with two equivalent Ni(3)O6 octahedra. In the third Ni site, Ni(3) is bonded to one O(2), one O(7), two equivalent O(1), and two equivalent O(10) atoms to form NiO6 octahedra that share  a cornercorner with one Na(3)O6 octahedra, edges with two equivalent Ni(2)O6 octahedra, edges with two equivalent Ni(3)O6 octahedra, and edges with two equivalent Ni(6)O6 octahedra. The corner-sharing octahedral tilt angles are 8°. In the fourth Ni site, Ni(4) is bonded to two equivalent O(9) and four equivalent O(8) atoms to form edge-sharing NiO6 octahedra. In the fifth Ni site, Ni(5) is bonded to one O(4), one O(8), two equivalent O(6), and two equivalent O(9) atoms to form edge-sharing NiO6 octahedra. In the sixth Ni site, Ni(6) is bonded to two equivalent O(10) and four equivalent O(7) atoms to form edge-sharing NiO6 octahedra. There are ten inequivalent O sites. In the first O site, O(1) is bonded to one Na(4), two equivalent Na(1), one Ni(2), and two equivalent Ni(3) atoms to form distorted ONa3Ni3 octahedra that share  a cornercorner with one O(5)Na3Ni3 octahedra, corners with two equivalent O(4)Na2Ni3 square pyramids,  a cornercorner with one O(8)NaNi3 trigonal pyramid, corners with two equivalent O(10)NaNi3 trigonal pyramids, edges with two equivalent O(1)Na3Ni3 octahedra, edges with two equivalent O(2)Na3Ni3 octahedra, edges with two equivalent O(9)Na3Ni3 octahedra,  an edgeedge with one O(4)Na2Ni3 square pyramid, edges with two equivalent O(7)Na2Ni3 square pyramids,  an edgeedge with one O(10)NaNi3 trigonal pyramid, and edges with two equivalent O(3)NaNi3 trigonal pyramids. The corner-sharing octahedral tilt angles are 3°. In the second O site, O(2) is bonded to one Na(3), two equivalent Na(2), one Ni(3), and two equivalent Ni(2) atoms to form ONa3Ni3 octahedra that share  a cornercorner with one O(2)Na3Ni3 octahedra,  a cornercorner with one O(7)Na2Ni3 square pyramid, corners with two equivalent O(6)Na2Ni3 square pyramids, corners with two equivalent O(3)NaNi3 trigonal pyramids, edges with two equivalent O(1)Na3Ni3 octahedra, edges with two equivalent O(2)Na3Ni3 octahedra, edges with four equivalent O(5)Na3Ni3 octahedra,  an edgeedge with one O(6)Na2Ni3 square pyramid,  an edgeedge with one O(3)NaNi3 trigonal pyramid, and edges with two equivalent O(10)NaNi3 trigonal pyramids. The corner-sharing octahedra are not tilted. In the third O site, O(3) is bonded to one Na(1), one Ni(1), and two equivalent Ni(2) atoms to form ONaNi3 trigonal pyramids that share  a cornercorner with one O(9)Na3Ni3 octahedra, corners with two equivalent O(2)Na3Ni3 octahedra,  a cornercorner with one O(6)Na2Ni3 square pyramid, corners with four equivalent O(4)Na2Ni3 square pyramids, corners with two equivalent O(3)NaNi3 trigonal pyramids,  an edgeedge with one O(2)Na3Ni3 octahedra, edges with two equivalent O(1)Na3Ni3 octahedra, and edges with two equivalent O(5)Na3Ni3 octahedra. The corner-sharing octahedral tilt angles range from 1-15°. In the fourth O site, O(4) is bonded to two equivalent Na(1), one Ni(5), and two equivalent Ni(1) atoms to form distorted ONa2Ni3 square pyramids that share corners with two equivalent O(1)Na3Ni3 octahedra, corners with two equivalent O(5)Na3Ni3 octahedra,  a cornercorner with one O(8)NaNi3 trigonal pyramid, corners with four equivalent O(3)NaNi3 trigonal pyramids,  an edgeedge with one O(1)Na3Ni3 octahedra,  an edgeedge with one O(5)Na3Ni3 octahedra, edges with two equivalent O(9)Na3Ni3 octahedra, edges with two equivalent O(4)Na2Ni3 square pyramids, and edges with two equivalent O(6)Na2Ni3 square pyramids. The corner-sharing octahedral tilt angles range from 1-18°. In the fifth O site, O(5) is bonded to one Na(2), two equivalent Na(3), one Ni(2), and two equivalent Ni(1) atoms to form ONa3Ni3 octahedra that share  a cornercorner with one O(1)Na3Ni3 octahedra, corners with two equivalent O(5)Na3Ni3 octahedra, corners with two equivalent O(4)Na2Ni3 square pyramids,  a cornercorner with one O(10)NaNi3 trigonal pyramid, edges with three equivalent O(5)Na3Ni3 octahedra, edges with four equivalent O(2)Na3Ni3 octahedra,  an edgeedge with one O(4)Na2Ni3 square pyramid, edges with two equivalent O(6)Na2Ni3 square pyramids, and edges with two equivalent O(3)NaNi3 trigonal pyramids. The corner-sharing octahedral tilt angles range from 0-3°. In the sixth O site, O(6) is bonded to two equivalent Na(2), one Ni(1), and two equivalent Ni(5) atoms to form distorted ONa2Ni3 square pyramids that share corners with two equivalent O(2)Na3Ni3 octahedra, corners with two equivalent O(9)Na3Ni3 octahedra,  a cornercorner with one O(3)NaNi3 trigonal pyramid, corners with two equivalent O(10)NaNi3 trigonal pyramids, corners with two equivalent O(8)NaNi3 trigonal pyramids,  an edgeedge with one O(2)Na3Ni3 octahedra,  an edgeedge with one O(9)Na3Ni3 octahedra, edges with two equivalent O(5)Na3Ni3 octahedra, edges with two equivalent O(4)Na2Ni3 square pyramids, and edges with two equivalent O(6)Na2Ni3 square pyramids. The corner-sharing octahedral tilt angles range from 1-16°. In the seventh O site, O(7) is bonded to two equivalent Na(4), one Ni(3), and two equivalent Ni(6) atoms to form distorted ONa2Ni3 square pyramids that share  a cornercorner with one O(2)Na3Ni3 octahedra, corners with two equivalent O(9)Na3Ni3 octahedra, corners with two equivalent O(7)Na2Ni3 square pyramids, corners with two equivalent O(10)NaNi3 trigonal pyramids, corners with two equivalent O(8)NaNi3 trigonal pyramids,  an edgeedge with one O(9)Na3Ni3 octahedra, edges with two equivalent O(1)Na3Ni3 octahedra, edges with three equivalent O(7)Na2Ni3 square pyramids, and edges with two equivalent O(10)NaNi3 trigonal pyramids. The corner-sharing octahedral tilt angles range from 3-12°. In the eighth O site, O(8) is bonded to one Na(4), one Ni(5), and two equivalent Ni(4) atoms to form distorted ONaNi3 trigonal pyramids that share  a cornercorner with one O(1)Na3Ni3 octahedra,  a cornercorner with one O(4)Na2Ni3 square pyramid, corners with two equivalent O(6)Na2Ni3 square pyramids, corners with two equivalent O(7)Na2Ni3 square pyramids, corners with four equivalent O(8)NaNi3 trigonal pyramids, edges with four equivalent O(9)Na3Ni3 octahedra, and  an edgeedge with one O(8)NaNi3 trigonal pyramid. The corner-sharing octahedral tilt angles are 11°. In the ninth O site, O(9) is bonded to one Na(1), two equivalent Na(4), one Ni(4), and two equivalent Ni(5) atoms to form distorted ONa3Ni3 octahedra that share  a cornercorner with one O(9)Na3Ni3 octahedra, corners with two equivalent O(6)Na2Ni3 square pyramids, corners with two equivalent O(7)Na2Ni3 square pyramids,  a cornercorner with one O(3)NaNi3 trigonal pyramid, edges with two equivalent O(1)Na3Ni3 octahedra, edges with two equivalent O(9)Na3Ni3 octahedra,  an edgeedge with one O(6)Na2Ni3 square pyramid,  an edgeedge with one O(7)Na2Ni3 square pyramid, edges with two equivalent O(4)Na2Ni3 square pyramids, and edges with four equivalent O(8)NaNi3 trigonal pyramids. The corner-sharing octahedra are not tilted. In the tenth O site, O(10) is bonded to one Na(2), one Ni(6), and two equivalent Ni(3) atoms to form distorted ONaNi3 trigonal pyramids that share  a cornercorner with one O(5)Na3Ni3 octahedra, corners with two equivalent O(1)Na3Ni3 octahedra, corners with two equivalent O(6)Na2Ni3 square pyramids, corners with two equivalent O(7)Na2Ni3 square pyramids, corners with three equivalent O(10)NaNi3 trigonal pyramids,  an edgeedge with one O(1)Na3Ni3 octahedra, edges with two equivalent O(2)Na3Ni3 octahedra, and edges with two equivalent O(7)Na2Ni3 square pyramids. The corner-sharing octahedral tilt angles range from 1-16°. is represented by the CIF file [CIF]
data_Na7(NiO2)10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.916
_cell_length_b   10.879
_cell_length_c   12.702
_cell_angle_alpha   107.745
_cell_angle_beta   91.595
_cell_angle_gamma   91.126
_symmetry_Int_Tables_number   1
_cell_volume   383.484
_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  0.003  0.912  0.831  1.0
  Na  Na1  1  0.489  0.382  0.770  1.0
  Na  Na2  1  0.000  0.500  0.000  1.0
  Na  Na3  1  0.997  0.088  0.169  1.0
  Na  Na4  1  0.511  0.618  0.230  1.0
  Na  Na5  1  0.509  0.211  0.421  1.0
  Na  Na6  1  0.491  0.789  0.579  1.0
  Ni  Ni7  1  0.002  0.203  0.898  1.0
  Ni  Ni8  1  0.998  0.797  0.102  1.0
  Ni  Ni9  1  0.495  0.693  0.902  1.0
  Ni  Ni10  1  0.505  0.307  0.098  1.0
  Ni  Ni11  1  0.005  0.398  0.300  1.0
  Ni  Ni12  1  0.000  0.000  0.500  1.0
  Ni  Ni13  1  0.499  0.906  0.301  1.0
  Ni  Ni14  1  0.500  0.500  0.500  1.0
  Ni  Ni15  1  0.995  0.602  0.700  1.0
  Ni  Ni16  1  0.501  0.094  0.699  1.0
  O  O17  1  0.509  0.722  0.757  1.0
  O  O18  1  0.023  0.569  0.838  1.0
  O  O19  1  0.031  0.189  0.039  1.0
  O  O20  1  0.496  0.080  0.843  1.0
  O  O21  1  0.493  0.672  0.050  1.0
  O  O22  1  0.028  0.783  0.244  1.0
  O  O23  1  0.507  0.328  0.950  1.0
  O  O24  1  0.972  0.217  0.756  1.0
  O  O25  1  0.969  0.811  0.961  1.0
  O  O26  1  0.504  0.920  0.157  1.0
  O  O27  1  0.491  0.278  0.243  1.0
  O  O28  1  0.032  0.376  0.439  1.0
  O  O29  1  0.487  0.887  0.443  1.0
  O  O30  1  0.031  0.968  0.638  1.0
  O  O31  1  0.519  0.514  0.357  1.0
  O  O32  1  0.977  0.431  0.162  1.0
  O  O33  1  0.969  0.032  0.362  1.0
  O  O34  1  0.513  0.113  0.557  1.0
  O  O35  1  0.968  0.624  0.561  1.0
  O  O36  1  0.481  0.486  0.643  1.0
[/CIF]
.
The structure described by Na7(NiO2)10 crystallizes in the triclinic P-1 space group. There are four inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to one O(3), one O(9), two equivalent O(1), and two equivalent O(4) atoms. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to one O(10), one O(5), two equivalent O(2), and two equivalent O(6) atoms. In the third Na site, Na(3) is bonded to two equivalent O(2) and four equivalent O(5) atoms to form distorted NaO6 octahedra that share corners with two equivalent Ni(3)O6 octahedra, corners with four equivalent Ni(1)O6 octahedra, edges with two equivalent Na(3)O6 octahedra, edges with two equivalent Ni(1)O6 octahedra, and edges with four equivalent Ni(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 8-12°. In the fourth Na site, Na(4) is bonded in a 6-coordinate geometry to one O(1), one O(8), two equivalent O(7), and two equivalent O(9) atoms. There are six inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to one O(3), one O(6), two equivalent O(4), and two equivalent O(5) atoms to form NiO6 octahedra that share corners with two equivalent Na(3)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra, edges with two equivalent Ni(1)O6 octahedra, edges with two equivalent Ni(2)O6 octahedra, and edges with two equivalent Ni(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 10-12°. In the second Ni site, Ni(2) is bonded to one O(1), one O(5), two equivalent O(2), and two equivalent O(3) atoms to form NiO6 octahedra that share edges with two equivalent Na(3)O6 octahedra, edges with two equivalent Ni(1)O6 octahedra, edges with two equivalent Ni(2)O6 octahedra, and edges with two equivalent Ni(3)O6 octahedra. In the third Ni site, Ni(3) is bonded to one O(2), one O(7), two equivalent O(1), and two equivalent O(10) atoms to form NiO6 octahedra that share  a cornercorner with one Na(3)O6 octahedra, edges with two equivalent Ni(2)O6 octahedra, edges with two equivalent Ni(3)O6 octahedra, and edges with two equivalent Ni(6)O6 octahedra. The corner-sharing octahedral tilt angles are 8°. In the fourth Ni site, Ni(4) is bonded to two equivalent O(9) and four equivalent O(8) atoms to form edge-sharing NiO6 octahedra. In the fifth Ni site, Ni(5) is bonded to one O(4), one O(8), two equivalent O(6), and two equivalent O(9) atoms to form edge-sharing NiO6 octahedra. In the sixth Ni site, Ni(6) is bonded to two equivalent O(10) and four equivalent O(7) atoms to form edge-sharing NiO6 octahedra. There are ten inequivalent O sites. In the first O site, O(1) is bonded to one Na(4), two equivalent Na(1), one Ni(2), and two equivalent Ni(3) atoms to form distorted ONa3Ni3 octahedra that share  a cornercorner with one O(5)Na3Ni3 octahedra, corners with two equivalent O(4)Na2Ni3 square pyramids,  a cornercorner with one O(8)NaNi3 trigonal pyramid, corners with two equivalent O(10)NaNi3 trigonal pyramids, edges with two equivalent O(1)Na3Ni3 octahedra, edges with two equivalent O(2)Na3Ni3 octahedra, edges with two equivalent O(9)Na3Ni3 octahedra,  an edgeedge with one O(4)Na2Ni3 square pyramid, edges with two equivalent O(7)Na2Ni3 square pyramids,  an edgeedge with one O(10)NaNi3 trigonal pyramid, and edges with two equivalent O(3)NaNi3 trigonal pyramids. The corner-sharing octahedral tilt angles are 3°. In the second O site, O(2) is bonded to one Na(3), two equivalent Na(2), one Ni(3), and two equivalent Ni(2) atoms to form ONa3Ni3 octahedra that share  a cornercorner with one O(2)Na3Ni3 octahedra,  a cornercorner with one O(7)Na2Ni3 square pyramid, corners with two equivalent O(6)Na2Ni3 square pyramids, corners with two equivalent O(3)NaNi3 trigonal pyramids, edges with two equivalent O(1)Na3Ni3 octahedra, edges with two equivalent O(2)Na3Ni3 octahedra, edges with four equivalent O(5)Na3Ni3 octahedra,  an edgeedge with one O(6)Na2Ni3 square pyramid,  an edgeedge with one O(3)NaNi3 trigonal pyramid, and edges with two equivalent O(10)NaNi3 trigonal pyramids. The corner-sharing octahedra are not tilted. In the third O site, O(3) is bonded to one Na(1), one Ni(1), and two equivalent Ni(2) atoms to form ONaNi3 trigonal pyramids that share  a cornercorner with one O(9)Na3Ni3 octahedra, corners with two equivalent O(2)Na3Ni3 octahedra,  a cornercorner with one O(6)Na2Ni3 square pyramid, corners with four equivalent O(4)Na2Ni3 square pyramids, corners with two equivalent O(3)NaNi3 trigonal pyramids,  an edgeedge with one O(2)Na3Ni3 octahedra, edges with two equivalent O(1)Na3Ni3 octahedra, and edges with two equivalent O(5)Na3Ni3 octahedra. The corner-sharing octahedral tilt angles range from 1-15°. In the fourth O site, O(4) is bonded to two equivalent Na(1), one Ni(5), and two equivalent Ni(1) atoms to form distorted ONa2Ni3 square pyramids that share corners with two equivalent O(1)Na3Ni3 octahedra, corners with two equivalent O(5)Na3Ni3 octahedra,  a cornercorner with one O(8)NaNi3 trigonal pyramid, corners with four equivalent O(3)NaNi3 trigonal pyramids,  an edgeedge with one O(1)Na3Ni3 octahedra,  an edgeedge with one O(5)Na3Ni3 octahedra, edges with two equivalent O(9)Na3Ni3 octahedra, edges with two equivalent O(4)Na2Ni3 square pyramids, and edges with two equivalent O(6)Na2Ni3 square pyramids. The corner-sharing octahedral tilt angles range from 1-18°. In the fifth O site, O(5) is bonded to one Na(2), two equivalent Na(3), one Ni(2), and two equivalent Ni(1) atoms to form ONa3Ni3 octahedra that share  a cornercorner with one O(1)Na3Ni3 octahedra, corners with two equivalent O(5)Na3Ni3 octahedra, corners with two equivalent O(4)Na2Ni3 square pyramids,  a cornercorner with one O(10)NaNi3 trigonal pyramid, edges with three equivalent O(5)Na3Ni3 octahedra, edges with four equivalent O(2)Na3Ni3 octahedra,  an edgeedge with one O(4)Na2Ni3 square pyramid, edges with two equivalent O(6)Na2Ni3 square pyramids, and edges with two equivalent O(3)NaNi3 trigonal pyramids. The corner-sharing octahedral tilt angles range from 0-3°. In the sixth O site, O(6) is bonded to two equivalent Na(2), one Ni(1), and two equivalent Ni(5) atoms to form distorted ONa2Ni3 square pyramids that share corners with two equivalent O(2)Na3Ni3 octahedra, corners with two equivalent O(9)Na3Ni3 octahedra,  a cornercorner with one O(3)NaNi3 trigonal pyramid, corners with two equivalent O(10)NaNi3 trigonal pyramids, corners with two equivalent O(8)NaNi3 trigonal pyramids,  an edgeedge with one O(2)Na3Ni3 octahedra,  an edgeedge with one O(9)Na3Ni3 octahedra, edges with two equivalent O(5)Na3Ni3 octahedra, edges with two equivalent O(4)Na2Ni3 square pyramids, and edges with two equivalent O(6)Na2Ni3 square pyramids. The corner-sharing octahedral tilt angles range from 1-16°. In the seventh O site, O(7) is bonded to two equivalent Na(4), one Ni(3), and two equivalent Ni(6) atoms to form distorted ONa2Ni3 square pyramids that share  a cornercorner with one O(2)Na3Ni3 octahedra, corners with two equivalent O(9)Na3Ni3 octahedra, corners with two equivalent O(7)Na2Ni3 square pyramids, corners with two equivalent O(10)NaNi3 trigonal pyramids, corners with two equivalent O(8)NaNi3 trigonal pyramids,  an edgeedge with one O(9)Na3Ni3 octahedra, edges with two equivalent O(1)Na3Ni3 octahedra, edges with three equivalent O(7)Na2Ni3 square pyramids, and edges with two equivalent O(10)NaNi3 trigonal pyramids. The corner-sharing octahedral tilt angles range from 3-12°. In the eighth O site, O(8) is bonded to one Na(4), one Ni(5), and two equivalent Ni(4) atoms to form distorted ONaNi3 trigonal pyramids that share  a cornercorner with one O(1)Na3Ni3 octahedra,  a cornercorner with one O(4)Na2Ni3 square pyramid, corners with two equivalent O(6)Na2Ni3 square pyramids, corners with two equivalent O(7)Na2Ni3 square pyramids, corners with four equivalent O(8)NaNi3 trigonal pyramids, edges with four equivalent O(9)Na3Ni3 octahedra, and  an edgeedge with one O(8)NaNi3 trigonal pyramid. The corner-sharing octahedral tilt angles are 11°. In the ninth O site, O(9) is bonded to one Na(1), two equivalent Na(4), one Ni(4), and two equivalent Ni(5) atoms to form distorted ONa3Ni3 octahedra that share  a cornercorner with one O(9)Na3Ni3 octahedra, corners with two equivalent O(6)Na2Ni3 square pyramids, corners with two equivalent O(7)Na2Ni3 square pyramids,  a cornercorner with one O(3)NaNi3 trigonal pyramid, edges with two equivalent O(1)Na3Ni3 octahedra, edges with two equivalent O(9)Na3Ni3 octahedra,  an edgeedge with one O(6)Na2Ni3 square pyramid,  an edgeedge with one O(7)Na2Ni3 square pyramid, edges with two equivalent O(4)Na2Ni3 square pyramids, and edges with four equivalent O(8)NaNi3 trigonal pyramids. The corner-sharing octahedra are not tilted. In the tenth O site, O(10) is bonded to one Na(2), one Ni(6), and two equivalent Ni(3) atoms to form distorted ONaNi3 trigonal pyramids that share  a cornercorner with one O(5)Na3Ni3 octahedra, corners with two equivalent O(1)Na3Ni3 octahedra, corners with two equivalent O(6)Na2Ni3 square pyramids, corners with two equivalent O(7)Na2Ni3 square pyramids, corners with three equivalent O(10)NaNi3 trigonal pyramids,  an edgeedge with one O(1)Na3Ni3 octahedra, edges with two equivalent O(2)Na3Ni3 octahedra, and edges with two equivalent O(7)Na2Ni3 square pyramids. The corner-sharing octahedral tilt angles range from 1-16°. is represented by the CIF file [CIF]
data_Na7(NiO2)10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.916
_cell_length_b   10.879
_cell_length_c   12.702
_cell_angle_alpha   107.745
_cell_angle_beta   91.595
_cell_angle_gamma   91.126
_symmetry_Int_Tables_number   1
_cell_volume   383.484
_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  0.003  0.912  0.831  1.0
  Na  Na1  1  0.489  0.382  0.770  1.0
  Na  Na2  1  0.000  0.500  0.000  1.0
  Na  Na3  1  0.997  0.088  0.169  1.0
  Na  Na4  1  0.511  0.618  0.230  1.0
  Na  Na5  1  0.509  0.211  0.421  1.0
  Na  Na6  1  0.491  0.789  0.579  1.0
  Ni  Ni7  1  0.002  0.203  0.898  1.0
  Ni  Ni8  1  0.998  0.797  0.102  1.0
  Ni  Ni9  1  0.495  0.693  0.902  1.0
  Ni  Ni10  1  0.505  0.307  0.098  1.0
  Ni  Ni11  1  0.005  0.398  0.300  1.0
  Ni  Ni12  1  0.000  0.000  0.500  1.0
  Ni  Ni13  1  0.499  0.906  0.301  1.0
  Ni  Ni14  1  0.500  0.500  0.500  1.0
  Ni  Ni15  1  0.995  0.602  0.700  1.0
  Ni  Ni16  1  0.501  0.094  0.699  1.0
  O  O17  1  0.509  0.722  0.757  1.0
  O  O18  1  0.023  0.569  0.838  1.0
  O  O19  1  0.031  0.189  0.039  1.0
  O  O20  1  0.496  0.080  0.843  1.0
  O  O21  1  0.493  0.672  0.050  1.0
  O  O22  1  0.028  0.783  0.244  1.0
  O  O23  1  0.507  0.328  0.950  1.0
  O  O24  1  0.972  0.217  0.756  1.0
  O  O25  1  0.969  0.811  0.961  1.0
  O  O26  1  0.504  0.920  0.157  1.0
  O  O27  1  0.491  0.278  0.243  1.0
  O  O28  1  0.032  0.376  0.439  1.0
  O  O29  1  0.487  0.887  0.443  1.0
  O  O30  1  0.031  0.968  0.638  1.0
  O  O31  1  0.519  0.514  0.357  1.0
  O  O32  1  0.977  0.431  0.162  1.0
  O  O33  1  0.969  0.032  0.362  1.0
  O  O34  1  0.513  0.113  0.557  1.0
  O  O35  1  0.968  0.624  0.561  1.0
  O  O36  1  0.481  0.486  0.643  1.0
[/CIF]
.