The compound described by Na9Ni11O20 is Caswellsilverite-like structured and crystallizes in the triclinic P-1 space group. There are five inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(1), one O(2), one O(5), one O(6), and two equivalent O(3) atoms to form distorted NaO6 octahedra that share  a cornercorner with one Ni(1)O6 octahedra, corners with two equivalent Ni(4)O6 octahedra, corners with three equivalent Ni(6)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra,  an edgeedge with one Ni(4)O6 octahedra,  an edgeedge with one Ni(5)O6 octahedra, edges with two equivalent Na(5)O6 octahedra, and edges with two equivalent Ni(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 12-20°. In the second Na site, Na(2) is bonded to one O(1), one O(2), one O(7), one O(8), and two equivalent O(4) atoms to form NaO6 octahedra that share  a cornercorner with one Ni(2)O6 octahedra, corners with two equivalent Ni(3)O6 octahedra, corners with three equivalent Ni(5)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Na(5)O6 octahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra,  an edgeedge with one Ni(3)O6 octahedra,  an edgeedge with one Ni(6)O6 octahedra,  an edgeedge with one Ni(7)O6 octahedra, edges with two equivalent Na(3)O6 octahedra, and edges with two equivalent Ni(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-17°. In the third Na site, Na(3) is bonded to one O(10), one O(2), one O(4), one O(6), one O(7), and one O(9) atom to form NaO6 octahedra that share  a cornercorner with one Ni(1)O6 octahedra, corners with two equivalent Ni(6)O6 octahedra, corners with three equivalent Ni(4)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Na(5)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra,  an edgeedge with one Ni(3)O6 octahedra,  an edgeedge with one Ni(4)O6 octahedra,  an edgeedge with one Ni(6)O6 octahedra,  an edgeedge with one Ni(7)O6 octahedra, edges with two equivalent Na(2)O6 octahedra, and edges with two equivalent Ni(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 10-14°. In the fourth Na site, Na(4) is bonded to two equivalent O(10), two equivalent O(5), and two equivalent O(6) atoms to form distorted NaO6 octahedra that share corners with two equivalent Ni(2)O6 octahedra, corners with two equivalent Ni(3)O6 octahedra, corners with two equivalent Ni(5)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, edges with two equivalent Na(3)O6 octahedra, edges with two equivalent Na(5)O6 octahedra, edges with two equivalent Ni(4)O6 octahedra, edges with two equivalent Ni(5)O6 octahedra, and edges with two equivalent Ni(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 12-16°. In the fifth Na site, Na(5) is bonded to one O(1), one O(10), one O(3), one O(5), one O(8), and one O(9) atom to form NaO6 octahedra that share  a cornercorner with one Ni(2)O6 octahedra, corners with two equivalent Ni(5)O6 octahedra, corners with three equivalent Ni(3)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(3)O6 octahedra,  an edgeedge with one Ni(4)O6 octahedra,  an edgeedge with one Ni(5)O6 octahedra,  an edgeedge with one Ni(7)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, and edges with two equivalent Ni(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-15°. There are seven inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(8) atoms to form NiO6 octahedra that share corners with two equivalent Na(1)O6 octahedra, corners with two equivalent Na(3)O6 octahedra, corners with two equivalent Ni(7)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, edges with two equivalent Na(2)O6 octahedra, edges with two equivalent Na(5)O6 octahedra, edges with two equivalent Ni(3)O6 octahedra, edges with two equivalent Ni(4)O6 octahedra, and edges with two equivalent Ni(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 7-14°. In the second Ni site, Ni(2) is bonded to two equivalent O(1), two equivalent O(4), and two equivalent O(6) atoms to form NiO6 octahedra that share corners with two equivalent Na(2)O6 octahedra, corners with two equivalent Na(4)O6 octahedra, corners with two equivalent Na(5)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, edges with two equivalent Na(2)O6 octahedra, edges with two equivalent Na(3)O6 octahedra, edges with two equivalent Ni(3)O6 octahedra, edges with two equivalent Ni(4)O6 octahedra, and edges with two equivalent Ni(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 15-17°. In the third Ni site, Ni(3) is bonded to one O(1), one O(3), one O(4), one O(5), one O(8), and one O(9) atom to form NiO6 octahedra that share  a cornercorner with one Na(4)O6 octahedra, corners with two equivalent Na(2)O6 octahedra, corners with three equivalent Na(5)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Na(5)O6 octahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra,  an edgeedge with one Ni(4)O6 octahedra,  an edgeedge with one Ni(5)O6 octahedra,  an edgeedge with one Ni(7)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, and edges with two equivalent Ni(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-12°. In the fourth Ni site, Ni(4) is bonded to one O(10), one O(2), one O(3), one O(4), one O(6), and one O(7) atom to form NiO6 octahedra that share  a cornercorner with one Ni(7)O6 octahedra, corners with two equivalent Na(1)O6 octahedra, corners with three equivalent Na(3)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Na(5)O6 octahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra,  an edgeedge with one Ni(3)O6 octahedra,  an edgeedge with one Ni(6)O6 octahedra, edges with two equivalent Na(2)O6 octahedra, and edges with two equivalent Ni(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 10-17°. In the fifth Ni site, Ni(5) is bonded to one O(2), one O(5), one O(7), one O(8), and two equivalent O(10) atoms to form NiO6 octahedra that share  a cornercorner with one Na(4)O6 octahedra, corners with two equivalent Na(5)O6 octahedra, corners with three equivalent Na(2)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Na(5)O6 octahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(3)O6 octahedra,  an edgeedge with one Ni(5)O6 octahedra,  an edgeedge with one Ni(6)O6 octahedra,  an edgeedge with one Ni(7)O6 octahedra, edges with two equivalent Na(3)O6 octahedra, and edges with two equivalent Ni(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-15°. In the sixth Ni site, Ni(6) is bonded to one O(1), one O(5), one O(6), one O(7), and two equivalent O(9) atoms to form NiO6 octahedra that share  a cornercorner with one Ni(7)O6 octahedra, corners with two equivalent Na(3)O6 octahedra, corners with three equivalent Na(1)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra,  an edgeedge with one Ni(4)O6 octahedra,  an edgeedge with one Ni(5)O6 octahedra,  an edgeedge with one Ni(6)O6 octahedra,  an edgeedge with one Ni(7)O6 octahedra, edges with two equivalent Na(5)O6 octahedra, and edges with two equivalent Ni(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 11-20°. In the seventh Ni site, Ni(7) is bonded to two equivalent O(7), two equivalent O(8), and two equivalent O(9) atoms to form NiO6 octahedra that share corners with two equivalent Ni(1)O6 octahedra, corners with two equivalent Ni(4)O6 octahedra, corners with two equivalent Ni(6)O6 octahedra, edges with two equivalent Na(2)O6 octahedra, edges with two equivalent Na(3)O6 octahedra, edges with two equivalent Na(5)O6 octahedra, edges with two equivalent Ni(3)O6 octahedra, edges with two equivalent Ni(5)O6 octahedra, and edges with two equivalent Ni(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 7-12°. There are ten inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), one Na(2), one Na(5), one Ni(2), one Ni(3), and one Ni(6) atom to form ONa3Ni3 octahedra that share  a cornercorner with one O(8)Na2Ni4 octahedra,  a cornercorner with one O(1)Na3Ni3 octahedra,  a cornercorner with one O(10)Na3Ni3 octahedra,  a cornercorner with one O(4)Na3Ni3 octahedra, corners with two equivalent O(5)Na3Ni3 octahedra,  an edgeedge with one O(7)Na2Ni4 octahedra,  an edgeedge with one O(8)Na2Ni4 octahedra,  an edgeedge with one O(2)Na3Ni3 octahedra,  an edgeedge with one O(5)Na3Ni3 octahedra, edges with two equivalent O(9)Na2Ni4 octahedra, edges with two equivalent O(3)Na3Ni3 octahedra, edges with two equivalent O(4)Na3Ni3 octahedra, and edges with two equivalent O(6)Na3Ni3 octahedra. The corner-sharing octahedral tilt angles range from 0-7°. In the second O site, O(2) is bonded to one Na(1), one Na(2), one Na(3), one Ni(1), one Ni(4), and one Ni(5) atom to form distorted ONa3Ni3 octahedra that share  a cornercorner with one O(9)Na2Ni4 octahedra,  a cornercorner with one O(2)Na3Ni3 octahedra,  a cornercorner with one O(3)Na3Ni3 octahedra,  a cornercorner with one O(6)Na3Ni3 octahedra, corners with two equivalent O(7)Na2Ni4 octahedra,  an edgeedge with one O(7)Na2Ni4 octahedra,  an edgeedge with one O(1)Na3Ni3 octahedra,  an edgeedge with one O(5)Na3Ni3 octahedra,  an edgeedge with one O(6)Na3Ni3 octahedra, edges with two equivalent O(8)Na2Ni4 octahedra, edges with two equivalent O(10)Na3Ni3 octahedra, edges with two equivalent O(3)Na3Ni3 octahedra, and edges with two equivalent O(4)Na3Ni3 octahedra. The corner-sharing octahedral tilt angles range from 0-12°. In the third O site, O(3) is bonded to one Na(5), two equivalent Na(1), one Ni(1), one Ni(3), and one Ni(4) atom to form ONa3Ni3 octahedra that share  a cornercorner with one O(7)Na2Ni4 octahedra,  a cornercorner with one O(2)Na3Ni3 octahedra,  a cornercorner with one O(3)Na3Ni3 octahedra,  a cornercorner with one O(6)Na3Ni3 octahedra, corners with two equivalent O(9)Na2Ni4 octahedra,  an edgeedge with one O(10)Na3Ni3 octahedra,  an edgeedge with one O(3)Na3Ni3 octahedra,  an edgeedge with one O(4)Na3Ni3 octahedra,  an edgeedge with one O(6)Na3Ni3 octahedra, edges with two equivalent O(8)Na2Ni4 octahedra, edges with two equivalent O(1)Na3Ni3 octahedra, edges with two equivalent O(2)Na3Ni3 octahedra, and edges with two equivalent O(5)Na3Ni3 octahedra. The corner-sharing octahedral tilt angles range from 0-8°. In the fourth O site, O(4) is bonded to one Na(3), two equivalent Na(2), one Ni(2), one Ni(3), and one Ni(4) atom to form ONa3Ni3 octahedra that share  a cornercorner with one O(8)Na2Ni4 octahedra,  a cornercorner with one O(1)Na3Ni3 octahedra,  a cornercorner with one O(4)Na3Ni3 octahedra,  a cornercorner with one O(5)Na3Ni3 octahedra, corners with two equivalent O(10)Na3Ni3 octahedra,  an edgeedge with one O(8)Na2Ni4 octahedra,  an edgeedge with one O(9)Na2Ni4 octahedra,  an edgeedge with one O(3)Na3Ni3 octahedra,  an edgeedge with one O(4)Na3Ni3 octahedra, edges with two equivalent O(7)Na2Ni4 octahedra, edges with two equivalent O(1)Na3Ni3 octahedra, edges with two equivalent O(2)Na3Ni3 octahedra, and edges with two equivalent O(6)Na3Ni3 octahedra. The corner-sharing octahedral tilt angles range from 0-8°. In the fifth O site, O(5) is bonded to one Na(1), one Na(4), one Na(5), one Ni(3), one Ni(5), and one Ni(6) atom to form distorted ONa3Ni3 octahedra that share  a cornercorner with one O(8)Na2Ni4 octahedra,  a cornercorner with one O(10)Na3Ni3 octahedra,  a cornercorner with one O(4)Na3Ni3 octahedra,  a cornercorner with one O(5)Na3Ni3 octahedra, corners with two equivalent O(1)Na3Ni3 octahedra,  an edgeedge with one O(7)Na2Ni4 octahedra,  an edgeedge with one O(8)Na2Ni4 octahedra,  an edgeedge with one O(1)Na3Ni3 octahedra,  an edgeedge with one O(2)Na3Ni3 octahedra, edges with two equivalent O(9)Na2Ni4 octahedra, edges with two equivalent O(10)Na3Ni3 octahedra, edges with two equivalent O(3)Na3Ni3 octahedra, and edges with two equivalent O(6)Na3Ni3 octahedra. The corner-sharing octahedral tilt angles range from 0-6°. In the sixth O site, O(6) is bonded to one Na(1), one Na(3), one Na(4), one Ni(2), one Ni(4), and one Ni(6) atom to form ONa3Ni3 octahedra that share  a cornercorner with one O(7)Na2Ni4 octahedra,  a cornercorner with one O(9)Na2Ni4 octahedra,  a cornercorner with one O(2)Na3Ni3 octahedra,  a cornercorner with one O(3)Na3Ni3 octahedra, corners with two equivalent O(6)Na3Ni3 octahedra,  an edgeedge with one O(7)Na2Ni4 octahedra,  an edgeedge with one O(9)Na2Ni4 octahedra,  an edgeedge with one O(2)Na3Ni3 octahedra,  an edgeedge with one O(3)Na3Ni3 octahedra, edges with two equivalent O(1)Na3Ni3 octahedra, edges with two equivalent O(10)Na3Ni3 octahedra, edges with two equivalent O(4)Na3Ni3 octahedra, and edges with two equivalent O(5)Na3Ni3 octahedra. The corner-sharing octahedral tilt angles range from 0-8°. In the seventh O site, O(7) is bonded to one Na(2), one Na(3), one Ni(4), one Ni(5), one Ni(6), and one Ni(7) atom to form ONa2Ni4 octahedra that share  a cornercorner with one O(7)Na2Ni4 octahedra,  a cornercorner with one O(9)Na2Ni4 octahedra,  a cornercorner with one O(3)Na3Ni3 octahedra,  a cornercorner with one O(6)Na3Ni3 octahedra, corners with two equivalent O(2)Na3Ni3 octahedra,  an edgeedge with one O(1)Na3Ni3 octahedra,  an edgeedge with one O(2)Na3Ni3 octahedra,  an edgeedge with one O(5)Na3Ni3 octahedra,  an edgeedge with one O(6)Na3Ni3 octahedra, edges with two equivalent O(8)Na2Ni4 octahedra, edges with two equivalent O(9)Na2Ni4 octahedra, edges with two equivalent O(10)Na3Ni3 octahedra, and edges with two equivalent O(4)Na3Ni3 octahedra. The corner-sharing octahedral tilt angles range from 0-12°. In the eighth O site, O(8) is bonded to one Na(2), one Na(5), one Ni(1), one Ni(3), one Ni(5), and one Ni(7) atom to form ONa2Ni4 octahedra that share  a cornercorner with one O(1)Na3Ni3 octahedra,  a cornercorner with one O(10)Na3Ni3 octahedra,  a cornercorner with one O(4)Na3Ni3 octahedra,  a cornercorner with one O(5)Na3Ni3 octahedra, corners with two equivalent O(8)Na2Ni4 octahedra,  an edgeedge with one O(1)Na3Ni3 octahedra,  an edgeedge with one O(10)Na3Ni3 octahedra,  an edgeedge with one O(4)Na3Ni3 octahedra,  an edgeedge with one O(5)Na3Ni3 octahedra, edges with two equivalent O(7)Na2Ni4 octahedra, edges with two equivalent O(9)Na2Ni4 octahedra, edges with two equivalent O(2)Na3Ni3 octahedra, and edges with two equivalent O(3)Na3Ni3 octahedra. The corner-sharing octahedral tilt angles range from 0-8°. In the ninth O site, O(9) is bonded to one Na(3), one Na(5), one Ni(3), one Ni(7), and two equivalent Ni(6) atoms to form ONa2Ni4 octahedra that share  a cornercorner with one O(7)Na2Ni4 octahedra,  a cornercorner with one O(9)Na2Ni4 octahedra,  a cornercorner with one O(2)Na3Ni3 octahedra,  a cornercorner with one O(6)Na3Ni3 octahedra, corners with two equivalent O(3)Na3Ni3 octahedra,  an edgeedge with one O(9)Na2Ni4 octahedra,  an edgeedge with one O(10)Na3Ni3 octahedra,  an edgeedge with one O(4)Na3Ni3 octahedra,  an edgeedge with one O(6)Na3Ni3 octahedra, edges with two equivalent O(7)Na2Ni4 octahedra, edges with two equivalent O(8)Na2Ni4 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 0-8°. In the tenth O site, O(10) is bonded to one Na(3), one Na(4), one Na(5), one Ni(4), and two equivalent Ni(5) atoms to form ONa3Ni3 octahedra that share  a cornercorner with one O(8)Na2Ni4 octahedra,  a cornercorner with one O(1)Na3Ni3 octahedra,  a cornercorner with one O(10)Na3Ni3 octahedra,  a cornercorner with one O(5)Na3Ni3 octahedra, corners with two equivalent O(4)Na3Ni3 octahedra,  an edgeedge with one O(8)Na2Ni4 octahedra,  an edgeedge with one O(9)Na2Ni4 octahedra,  an edgeedge with one O(10)Na3Ni3 octahedra,  an edgeedge with one O(3)Na3Ni3 octahedra, edges with two equivalent O(7)Na2Ni4 octahedra, edges with two equivalent O(2)Na3Ni3 octahedra, edges with two equivalent O(5)Na3Ni3 octahedra, and edges with two equivalent O(6)Na3Ni3 octahedra. The corner-sharing octahedral tilt angles range from 0-7°. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na9Ni11O20
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.753
_cell_length_b   7.887
_cell_length_c   8.008
_cell_angle_alpha   115.673
_cell_angle_beta   93.679
_cell_angle_gamma   89.348
_symmetry_Int_Tables_number   1
_cell_volume   383.555
_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  0.408  0.600  0.899  1.0
  Na  Na1  1  0.886  0.602  0.405  1.0
  Na  Na2  1  0.592  0.400  0.101  1.0
  Na  Na3  1  0.791  0.204  0.297  1.0
  Na  Na4  1  0.114  0.398  0.595  1.0
  Na  Na5  1  0.500  0.000  0.000  1.0
  Na  Na6  1  0.306  0.198  0.798  1.0
  Na  Na7  1  0.694  0.802  0.202  1.0
  Na  Na8  1  0.209  0.796  0.703  1.0
  Ni  Ni9  1  0.000  0.500  0.000  1.0
  Ni  Ni10  1  0.500  0.500  0.500  1.0
  Ni  Ni11  1  0.712  0.300  0.698  1.0
  Ni  Ni12  1  0.195  0.300  0.198  1.0
  Ni  Ni13  1  0.908  0.102  0.895  1.0
  Ni  Ni14  1  0.398  0.100  0.402  1.0
  Ni  Ni15  1  0.092  0.898  0.105  1.0
  Ni  Ni16  1  0.602  0.900  0.598  1.0
  Ni  Ni17  1  0.000  0.000  0.500  1.0
  Ni  Ni18  1  0.805  0.700  0.802  1.0
  Ni  Ni19  1  0.288  0.700  0.302  1.0
  O  O20  1  0.555  0.663  0.362  1.0
  O  O21  1  0.069  0.661  0.885  1.0
  O  O22  1  0.736  0.523  0.926  1.0
  O  O23  1  0.264  0.477  0.074  1.0
  O  O24  1  0.216  0.539  0.414  1.0
  O  O25  1  0.784  0.461  0.586  1.0
  O  O26  1  0.646  0.151  0.825  1.0
  O  O27  1  0.456  0.256  0.264  1.0
  O  O28  1  0.445  0.337  0.638  1.0
  O  O29  1  0.931  0.339  0.115  1.0
  O  O30  1  0.103  0.122  0.331  1.0
  O  O31  1  0.980  0.247  0.743  1.0
  O  O32  1  0.700  0.070  0.479  1.0
  O  O33  1  0.172  0.069  0.976  1.0
  O  O34  1  0.354  0.849  0.175  1.0
  O  O35  1  0.300  0.930  0.521  1.0
  O  O36  1  0.828  0.931  0.024  1.0
  O  O37  1  0.897  0.878  0.669  1.0
  O  O38  1  0.020  0.753  0.257  1.0
  O  O39  1  0.544  0.744  0.736  1.0
[/CIF]
.
The compound described by Na9Ni11O20 is Caswellsilverite-like structured and crystallizes in the triclinic P-1 space group. There are five inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(1), one O(2), one O(5), one O(6), and two equivalent O(3) atoms to form distorted NaO6 octahedra that share  a cornercorner with one Ni(1)O6 octahedra, corners with two equivalent Ni(4)O6 octahedra, corners with three equivalent Ni(6)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra,  an edgeedge with one Ni(4)O6 octahedra,  an edgeedge with one Ni(5)O6 octahedra, edges with two equivalent Na(5)O6 octahedra, and edges with two equivalent Ni(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 12-20°. In the second Na site, Na(2) is bonded to one O(1), one O(2), one O(7), one O(8), and two equivalent O(4) atoms to form NaO6 octahedra that share  a cornercorner with one Ni(2)O6 octahedra, corners with two equivalent Ni(3)O6 octahedra, corners with three equivalent Ni(5)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Na(5)O6 octahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra,  an edgeedge with one Ni(3)O6 octahedra,  an edgeedge with one Ni(6)O6 octahedra,  an edgeedge with one Ni(7)O6 octahedra, edges with two equivalent Na(3)O6 octahedra, and edges with two equivalent Ni(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-17°. In the third Na site, Na(3) is bonded to one O(10), one O(2), one O(4), one O(6), one O(7), and one O(9) atom to form NaO6 octahedra that share  a cornercorner with one Ni(1)O6 octahedra, corners with two equivalent Ni(6)O6 octahedra, corners with three equivalent Ni(4)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Na(5)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra,  an edgeedge with one Ni(3)O6 octahedra,  an edgeedge with one Ni(4)O6 octahedra,  an edgeedge with one Ni(6)O6 octahedra,  an edgeedge with one Ni(7)O6 octahedra, edges with two equivalent Na(2)O6 octahedra, and edges with two equivalent Ni(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 10-14°. In the fourth Na site, Na(4) is bonded to two equivalent O(10), two equivalent O(5), and two equivalent O(6) atoms to form distorted NaO6 octahedra that share corners with two equivalent Ni(2)O6 octahedra, corners with two equivalent Ni(3)O6 octahedra, corners with two equivalent Ni(5)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, edges with two equivalent Na(3)O6 octahedra, edges with two equivalent Na(5)O6 octahedra, edges with two equivalent Ni(4)O6 octahedra, edges with two equivalent Ni(5)O6 octahedra, and edges with two equivalent Ni(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 12-16°. In the fifth Na site, Na(5) is bonded to one O(1), one O(10), one O(3), one O(5), one O(8), and one O(9) atom to form NaO6 octahedra that share  a cornercorner with one Ni(2)O6 octahedra, corners with two equivalent Ni(5)O6 octahedra, corners with three equivalent Ni(3)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(3)O6 octahedra,  an edgeedge with one Ni(4)O6 octahedra,  an edgeedge with one Ni(5)O6 octahedra,  an edgeedge with one Ni(7)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, and edges with two equivalent Ni(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-15°. There are seven inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(8) atoms to form NiO6 octahedra that share corners with two equivalent Na(1)O6 octahedra, corners with two equivalent Na(3)O6 octahedra, corners with two equivalent Ni(7)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, edges with two equivalent Na(2)O6 octahedra, edges with two equivalent Na(5)O6 octahedra, edges with two equivalent Ni(3)O6 octahedra, edges with two equivalent Ni(4)O6 octahedra, and edges with two equivalent Ni(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 7-14°. In the second Ni site, Ni(2) is bonded to two equivalent O(1), two equivalent O(4), and two equivalent O(6) atoms to form NiO6 octahedra that share corners with two equivalent Na(2)O6 octahedra, corners with two equivalent Na(4)O6 octahedra, corners with two equivalent Na(5)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, edges with two equivalent Na(2)O6 octahedra, edges with two equivalent Na(3)O6 octahedra, edges with two equivalent Ni(3)O6 octahedra, edges with two equivalent Ni(4)O6 octahedra, and edges with two equivalent Ni(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 15-17°. In the third Ni site, Ni(3) is bonded to one O(1), one O(3), one O(4), one O(5), one O(8), and one O(9) atom to form NiO6 octahedra that share  a cornercorner with one Na(4)O6 octahedra, corners with two equivalent Na(2)O6 octahedra, corners with three equivalent Na(5)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Na(5)O6 octahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra,  an edgeedge with one Ni(4)O6 octahedra,  an edgeedge with one Ni(5)O6 octahedra,  an edgeedge with one Ni(7)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, and edges with two equivalent Ni(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-12°. In the fourth Ni site, Ni(4) is bonded to one O(10), one O(2), one O(3), one O(4), one O(6), and one O(7) atom to form NiO6 octahedra that share  a cornercorner with one Ni(7)O6 octahedra, corners with two equivalent Na(1)O6 octahedra, corners with three equivalent Na(3)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Na(5)O6 octahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra,  an edgeedge with one Ni(3)O6 octahedra,  an edgeedge with one Ni(6)O6 octahedra, edges with two equivalent Na(2)O6 octahedra, and edges with two equivalent Ni(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 10-17°. In the fifth Ni site, Ni(5) is bonded to one O(2), one O(5), one O(7), one O(8), and two equivalent O(10) atoms to form NiO6 octahedra that share  a cornercorner with one Na(4)O6 octahedra, corners with two equivalent Na(5)O6 octahedra, corners with three equivalent Na(2)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Na(5)O6 octahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(3)O6 octahedra,  an edgeedge with one Ni(5)O6 octahedra,  an edgeedge with one Ni(6)O6 octahedra,  an edgeedge with one Ni(7)O6 octahedra, edges with two equivalent Na(3)O6 octahedra, and edges with two equivalent Ni(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-15°. In the sixth Ni site, Ni(6) is bonded to one O(1), one O(5), one O(6), one O(7), and two equivalent O(9) atoms to form NiO6 octahedra that share  a cornercorner with one Ni(7)O6 octahedra, corners with two equivalent Na(3)O6 octahedra, corners with three equivalent Na(1)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra,  an edgeedge with one Ni(4)O6 octahedra,  an edgeedge with one Ni(5)O6 octahedra,  an edgeedge with one Ni(6)O6 octahedra,  an edgeedge with one Ni(7)O6 octahedra, edges with two equivalent Na(5)O6 octahedra, and edges with two equivalent Ni(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 11-20°. In the seventh Ni site, Ni(7) is bonded to two equivalent O(7), two equivalent O(8), and two equivalent O(9) atoms to form NiO6 octahedra that share corners with two equivalent Ni(1)O6 octahedra, corners with two equivalent Ni(4)O6 octahedra, corners with two equivalent Ni(6)O6 octahedra, edges with two equivalent Na(2)O6 octahedra, edges with two equivalent Na(3)O6 octahedra, edges with two equivalent Na(5)O6 octahedra, edges with two equivalent Ni(3)O6 octahedra, edges with two equivalent Ni(5)O6 octahedra, and edges with two equivalent Ni(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 7-12°. There are ten inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), one Na(2), one Na(5), one Ni(2), one Ni(3), and one Ni(6) atom to form ONa3Ni3 octahedra that share  a cornercorner with one O(8)Na2Ni4 octahedra,  a cornercorner with one O(1)Na3Ni3 octahedra,  a cornercorner with one O(10)Na3Ni3 octahedra,  a cornercorner with one O(4)Na3Ni3 octahedra, corners with two equivalent O(5)Na3Ni3 octahedra,  an edgeedge with one O(7)Na2Ni4 octahedra,  an edgeedge with one O(8)Na2Ni4 octahedra,  an edgeedge with one O(2)Na3Ni3 octahedra,  an edgeedge with one O(5)Na3Ni3 octahedra, edges with two equivalent O(9)Na2Ni4 octahedra, edges with two equivalent O(3)Na3Ni3 octahedra, edges with two equivalent O(4)Na3Ni3 octahedra, and edges with two equivalent O(6)Na3Ni3 octahedra. The corner-sharing octahedral tilt angles range from 0-7°. In the second O site, O(2) is bonded to one Na(1), one Na(2), one Na(3), one Ni(1), one Ni(4), and one Ni(5) atom to form distorted ONa3Ni3 octahedra that share  a cornercorner with one O(9)Na2Ni4 octahedra,  a cornercorner with one O(2)Na3Ni3 octahedra,  a cornercorner with one O(3)Na3Ni3 octahedra,  a cornercorner with one O(6)Na3Ni3 octahedra, corners with two equivalent O(7)Na2Ni4 octahedra,  an edgeedge with one O(7)Na2Ni4 octahedra,  an edgeedge with one O(1)Na3Ni3 octahedra,  an edgeedge with one O(5)Na3Ni3 octahedra,  an edgeedge with one O(6)Na3Ni3 octahedra, edges with two equivalent O(8)Na2Ni4 octahedra, edges with two equivalent O(10)Na3Ni3 octahedra, edges with two equivalent O(3)Na3Ni3 octahedra, and edges with two equivalent O(4)Na3Ni3 octahedra. The corner-sharing octahedral tilt angles range from 0-12°. In the third O site, O(3) is bonded to one Na(5), two equivalent Na(1), one Ni(1), one Ni(3), and one Ni(4) atom to form ONa3Ni3 octahedra that share  a cornercorner with one O(7)Na2Ni4 octahedra,  a cornercorner with one O(2)Na3Ni3 octahedra,  a cornercorner with one O(3)Na3Ni3 octahedra,  a cornercorner with one O(6)Na3Ni3 octahedra, corners with two equivalent O(9)Na2Ni4 octahedra,  an edgeedge with one O(10)Na3Ni3 octahedra,  an edgeedge with one O(3)Na3Ni3 octahedra,  an edgeedge with one O(4)Na3Ni3 octahedra,  an edgeedge with one O(6)Na3Ni3 octahedra, edges with two equivalent O(8)Na2Ni4 octahedra, edges with two equivalent O(1)Na3Ni3 octahedra, edges with two equivalent O(2)Na3Ni3 octahedra, and edges with two equivalent O(5)Na3Ni3 octahedra. The corner-sharing octahedral tilt angles range from 0-8°. In the fourth O site, O(4) is bonded to one Na(3), two equivalent Na(2), one Ni(2), one Ni(3), and one Ni(4) atom to form ONa3Ni3 octahedra that share  a cornercorner with one O(8)Na2Ni4 octahedra,  a cornercorner with one O(1)Na3Ni3 octahedra,  a cornercorner with one O(4)Na3Ni3 octahedra,  a cornercorner with one O(5)Na3Ni3 octahedra, corners with two equivalent O(10)Na3Ni3 octahedra,  an edgeedge with one O(8)Na2Ni4 octahedra,  an edgeedge with one O(9)Na2Ni4 octahedra,  an edgeedge with one O(3)Na3Ni3 octahedra,  an edgeedge with one O(4)Na3Ni3 octahedra, edges with two equivalent O(7)Na2Ni4 octahedra, edges with two equivalent O(1)Na3Ni3 octahedra, edges with two equivalent O(2)Na3Ni3 octahedra, and edges with two equivalent O(6)Na3Ni3 octahedra. The corner-sharing octahedral tilt angles range from 0-8°. In the fifth O site, O(5) is bonded to one Na(1), one Na(4), one Na(5), one Ni(3), one Ni(5), and one Ni(6) atom to form distorted ONa3Ni3 octahedra that share  a cornercorner with one O(8)Na2Ni4 octahedra,  a cornercorner with one O(10)Na3Ni3 octahedra,  a cornercorner with one O(4)Na3Ni3 octahedra,  a cornercorner with one O(5)Na3Ni3 octahedra, corners with two equivalent O(1)Na3Ni3 octahedra,  an edgeedge with one O(7)Na2Ni4 octahedra,  an edgeedge with one O(8)Na2Ni4 octahedra,  an edgeedge with one O(1)Na3Ni3 octahedra,  an edgeedge with one O(2)Na3Ni3 octahedra, edges with two equivalent O(9)Na2Ni4 octahedra, edges with two equivalent O(10)Na3Ni3 octahedra, edges with two equivalent O(3)Na3Ni3 octahedra, and edges with two equivalent O(6)Na3Ni3 octahedra. The corner-sharing octahedral tilt angles range from 0-6°. In the sixth O site, O(6) is bonded to one Na(1), one Na(3), one Na(4), one Ni(2), one Ni(4), and one Ni(6) atom to form ONa3Ni3 octahedra that share  a cornercorner with one O(7)Na2Ni4 octahedra,  a cornercorner with one O(9)Na2Ni4 octahedra,  a cornercorner with one O(2)Na3Ni3 octahedra,  a cornercorner with one O(3)Na3Ni3 octahedra, corners with two equivalent O(6)Na3Ni3 octahedra,  an edgeedge with one O(7)Na2Ni4 octahedra,  an edgeedge with one O(9)Na2Ni4 octahedra,  an edgeedge with one O(2)Na3Ni3 octahedra,  an edgeedge with one O(3)Na3Ni3 octahedra, edges with two equivalent O(1)Na3Ni3 octahedra, edges with two equivalent O(10)Na3Ni3 octahedra, edges with two equivalent O(4)Na3Ni3 octahedra, and edges with two equivalent O(5)Na3Ni3 octahedra. The corner-sharing octahedral tilt angles range from 0-8°. In the seventh O site, O(7) is bonded to one Na(2), one Na(3), one Ni(4), one Ni(5), one Ni(6), and one Ni(7) atom to form ONa2Ni4 octahedra that share  a cornercorner with one O(7)Na2Ni4 octahedra,  a cornercorner with one O(9)Na2Ni4 octahedra,  a cornercorner with one O(3)Na3Ni3 octahedra,  a cornercorner with one O(6)Na3Ni3 octahedra, corners with two equivalent O(2)Na3Ni3 octahedra,  an edgeedge with one O(1)Na3Ni3 octahedra,  an edgeedge with one O(2)Na3Ni3 octahedra,  an edgeedge with one O(5)Na3Ni3 octahedra,  an edgeedge with one O(6)Na3Ni3 octahedra, edges with two equivalent O(8)Na2Ni4 octahedra, edges with two equivalent O(9)Na2Ni4 octahedra, edges with two equivalent O(10)Na3Ni3 octahedra, and edges with two equivalent O(4)Na3Ni3 octahedra. The corner-sharing octahedral tilt angles range from 0-12°. In the eighth O site, O(8) is bonded to one Na(2), one Na(5), one Ni(1), one Ni(3), one Ni(5), and one Ni(7) atom to form ONa2Ni4 octahedra that share  a cornercorner with one O(1)Na3Ni3 octahedra,  a cornercorner with one O(10)Na3Ni3 octahedra,  a cornercorner with one O(4)Na3Ni3 octahedra,  a cornercorner with one O(5)Na3Ni3 octahedra, corners with two equivalent O(8)Na2Ni4 octahedra,  an edgeedge with one O(1)Na3Ni3 octahedra,  an edgeedge with one O(10)Na3Ni3 octahedra,  an edgeedge with one O(4)Na3Ni3 octahedra,  an edgeedge with one O(5)Na3Ni3 octahedra, edges with two equivalent O(7)Na2Ni4 octahedra, edges with two equivalent O(9)Na2Ni4 octahedra, edges with two equivalent O(2)Na3Ni3 octahedra, and edges with two equivalent O(3)Na3Ni3 octahedra. The corner-sharing octahedral tilt angles range from 0-8°. In the ninth O site, O(9) is bonded to one Na(3), one Na(5), one Ni(3), one Ni(7), and two equivalent Ni(6) atoms to form ONa2Ni4 octahedra that share  a cornercorner with one O(7)Na2Ni4 octahedra,  a cornercorner with one O(9)Na2Ni4 octahedra,  a cornercorner with one O(2)Na3Ni3 octahedra,  a cornercorner with one O(6)Na3Ni3 octahedra, corners with two equivalent O(3)Na3Ni3 octahedra,  an edgeedge with one O(9)Na2Ni4 octahedra,  an edgeedge with one O(10)Na3Ni3 octahedra,  an edgeedge with one O(4)Na3Ni3 octahedra,  an edgeedge with one O(6)Na3Ni3 octahedra, edges with two equivalent O(7)Na2Ni4 octahedra, edges with two equivalent O(8)Na2Ni4 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 0-8°. In the tenth O site, O(10) is bonded to one Na(3), one Na(4), one Na(5), one Ni(4), and two equivalent Ni(5) atoms to form ONa3Ni3 octahedra that share  a cornercorner with one O(8)Na2Ni4 octahedra,  a cornercorner with one O(1)Na3Ni3 octahedra,  a cornercorner with one O(10)Na3Ni3 octahedra,  a cornercorner with one O(5)Na3Ni3 octahedra, corners with two equivalent O(4)Na3Ni3 octahedra,  an edgeedge with one O(8)Na2Ni4 octahedra,  an edgeedge with one O(9)Na2Ni4 octahedra,  an edgeedge with one O(10)Na3Ni3 octahedra,  an edgeedge with one O(3)Na3Ni3 octahedra, edges with two equivalent O(7)Na2Ni4 octahedra, edges with two equivalent O(2)Na3Ni3 octahedra, edges with two equivalent O(5)Na3Ni3 octahedra, and edges with two equivalent O(6)Na3Ni3 octahedra. The corner-sharing octahedral tilt angles range from 0-7°. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na9Ni11O20
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.753
_cell_length_b   7.887
_cell_length_c   8.008
_cell_angle_alpha   115.673
_cell_angle_beta   93.679
_cell_angle_gamma   89.348
_symmetry_Int_Tables_number   1
_cell_volume   383.555
_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  0.408  0.600  0.899  1.0
  Na  Na1  1  0.886  0.602  0.405  1.0
  Na  Na2  1  0.592  0.400  0.101  1.0
  Na  Na3  1  0.791  0.204  0.297  1.0
  Na  Na4  1  0.114  0.398  0.595  1.0
  Na  Na5  1  0.500  0.000  0.000  1.0
  Na  Na6  1  0.306  0.198  0.798  1.0
  Na  Na7  1  0.694  0.802  0.202  1.0
  Na  Na8  1  0.209  0.796  0.703  1.0
  Ni  Ni9  1  0.000  0.500  0.000  1.0
  Ni  Ni10  1  0.500  0.500  0.500  1.0
  Ni  Ni11  1  0.712  0.300  0.698  1.0
  Ni  Ni12  1  0.195  0.300  0.198  1.0
  Ni  Ni13  1  0.908  0.102  0.895  1.0
  Ni  Ni14  1  0.398  0.100  0.402  1.0
  Ni  Ni15  1  0.092  0.898  0.105  1.0
  Ni  Ni16  1  0.602  0.900  0.598  1.0
  Ni  Ni17  1  0.000  0.000  0.500  1.0
  Ni  Ni18  1  0.805  0.700  0.802  1.0
  Ni  Ni19  1  0.288  0.700  0.302  1.0
  O  O20  1  0.555  0.663  0.362  1.0
  O  O21  1  0.069  0.661  0.885  1.0
  O  O22  1  0.736  0.523  0.926  1.0
  O  O23  1  0.264  0.477  0.074  1.0
  O  O24  1  0.216  0.539  0.414  1.0
  O  O25  1  0.784  0.461  0.586  1.0
  O  O26  1  0.646  0.151  0.825  1.0
  O  O27  1  0.456  0.256  0.264  1.0
  O  O28  1  0.445  0.337  0.638  1.0
  O  O29  1  0.931  0.339  0.115  1.0
  O  O30  1  0.103  0.122  0.331  1.0
  O  O31  1  0.980  0.247  0.743  1.0
  O  O32  1  0.700  0.070  0.479  1.0
  O  O33  1  0.172  0.069  0.976  1.0
  O  O34  1  0.354  0.849  0.175  1.0
  O  O35  1  0.300  0.930  0.521  1.0
  O  O36  1  0.828  0.931  0.024  1.0
  O  O37  1  0.897  0.878  0.669  1.0
  O  O38  1  0.020  0.753  0.257  1.0
  O  O39  1  0.544  0.744  0.736  1.0
[/CIF]
.