The compound described by Na6NiO4 is alpha Pu-derived structured and crystallizes in the triclinic P1 space group. There are twenty-four inequivalent Na sites. In the first Na site, Na(1) is bonded in a 4-coordinate geometry to one O(1), one O(11), one O(13), and one O(6) atom. In the second Na site, Na(2) is bonded to one O(12), one O(14), one O(2), and one O(5) atom to form distorted NaO4 trigonal pyramids that share corners with two equivalent Ni(2)O4 tetrahedra,  a cornercorner with one Na(5)O4 trigonal pyramid,  a cornercorner with one Na(6)O4 trigonal pyramid,  a cornercorner with one Na(9)O4 trigonal pyramid, corners with two equivalent Na(4)O4 trigonal pyramids, corners with two equivalent Na(8)O4 trigonal pyramids, and  an edgeedge with one Ni(3)O4 tetrahedra. In the third Na site, Na(3) is bonded to one O(1), one O(11), one O(15), and one O(8) atom to form distorted NaO4 trigonal pyramids that share corners with two equivalent Ni(4)O4 tetrahedra,  a cornercorner with one Na(11)O4 trigonal pyramid,  a cornercorner with one Na(12)O4 trigonal pyramid,  a cornercorner with one Na(5)O4 trigonal pyramid,  a cornercorner with one Na(6)O4 trigonal pyramid, corners with two equivalent Na(7)O4 trigonal pyramids, and  an edgeedge with one Ni(1)O4 tetrahedra. In the fourth Na site, Na(4) is bonded to one O(12), one O(16), one O(2), and one O(7) atom to form distorted NaO4 trigonal pyramids that share corners with two equivalent Ni(2)O4 tetrahedra,  a cornercorner with one Na(11)O4 trigonal pyramid,  a cornercorner with one Na(12)O4 trigonal pyramid,  a cornercorner with one Na(5)O4 trigonal pyramid,  a cornercorner with one Na(6)O4 trigonal pyramid, corners with two equivalent Na(2)O4 trigonal pyramids, corners with two equivalent Na(8)O4 trigonal pyramids, and  an edgeedge with one Ni(3)O4 tetrahedra. In the fifth Na site, Na(5) is bonded to one O(11), one O(3), one O(5), and one O(7) atom to form distorted NaO4 trigonal pyramids that share corners with two equivalent Ni(3)O4 tetrahedra,  a cornercorner with one Na(2)O4 trigonal pyramid,  a cornercorner with one Na(3)O4 trigonal pyramid,  a cornercorner with one Na(4)O4 trigonal pyramid, corners with two equivalent Na(11)O4 trigonal pyramids, corners with two equivalent Na(9)O4 trigonal pyramids, and  an edgeedge with one Ni(4)O4 tetrahedra. In the sixth Na site, Na(6) is bonded to one O(12), one O(4), one O(6), and one O(8) atom to form distorted NaO4 trigonal pyramids that share corners with two equivalent Ni(1)O4 tetrahedra,  a cornercorner with one Na(2)O4 trigonal pyramid,  a cornercorner with one Na(3)O4 trigonal pyramid,  a cornercorner with one Na(4)O4 trigonal pyramid, corners with two equivalent Na(12)O4 trigonal pyramids, and  an edgeedge with one Ni(2)O4 tetrahedra. In the seventh Na site, Na(7) is bonded to one O(1), one O(10), one O(13), and one O(15) atom to form distorted NaO4 trigonal pyramids that share corners with two equivalent Ni(4)O4 tetrahedra,  a cornercorner with one Na(11)O4 trigonal pyramid,  a cornercorner with one Na(12)O4 trigonal pyramid,  a cornercorner with one Na(9)O4 trigonal pyramid, corners with two equivalent Na(3)O4 trigonal pyramids, and  an edgeedge with one Ni(1)O4 tetrahedra. In the eighth Na site, Na(8) is bonded to one O(14), one O(16), one O(2), and one O(9) atom to form distorted NaO4 trigonal pyramids that share corners with two equivalent Ni(2)O4 tetrahedra,  a cornercorner with one Na(11)O4 trigonal pyramid,  a cornercorner with one Na(12)O4 trigonal pyramid,  a cornercorner with one Na(9)O4 trigonal pyramid, corners with two equivalent Na(2)O4 trigonal pyramids, corners with two equivalent Na(4)O4 trigonal pyramids, and  an edgeedge with one Ni(3)O4 tetrahedra. In the ninth Na site, Na(9) is bonded to one O(13), one O(3), one O(5), and one O(9) atom to form distorted NaO4 trigonal pyramids that share corners with two equivalent Ni(3)O4 tetrahedra,  a cornercorner with one Na(2)O4 trigonal pyramid,  a cornercorner with one Na(7)O4 trigonal pyramid,  a cornercorner with one Na(8)O4 trigonal pyramid, corners with two equivalent Na(11)O4 trigonal pyramids, corners with two equivalent Na(5)O4 trigonal pyramids, and  an edgeedge with one Ni(4)O4 tetrahedra. In the tenth Na site, Na(10) is bonded in a 4-coordinate geometry to one O(10), one O(14), one O(4), and one O(6) atom. In the eleventh Na site, Na(11) is bonded to one O(15), one O(3), one O(7), and one O(9) atom to form distorted NaO4 trigonal pyramids that share corners with two equivalent Ni(3)O4 tetrahedra,  a cornercorner with one Na(3)O4 trigonal pyramid,  a cornercorner with one Na(4)O4 trigonal pyramid,  a cornercorner with one Na(7)O4 trigonal pyramid,  a cornercorner with one Na(8)O4 trigonal pyramid, corners with two equivalent Na(5)O4 trigonal pyramids, corners with two equivalent Na(9)O4 trigonal pyramids, and  an edgeedge with one Ni(4)O4 tetrahedra. In the twelfth Na site, Na(12) is bonded to one O(10), one O(16), one O(4), and one O(8) atom to form distorted NaO4 trigonal pyramids that share corners with two equivalent Ni(1)O4 tetrahedra,  a cornercorner with one Na(3)O4 trigonal pyramid,  a cornercorner with one Na(4)O4 trigonal pyramid,  a cornercorner with one Na(7)O4 trigonal pyramid,  a cornercorner with one Na(8)O4 trigonal pyramid, corners with two equivalent Na(6)O4 trigonal pyramids, and  an edgeedge with one Ni(2)O4 tetrahedra. In the thirteenth Na site, Na(13) is bonded in a 3-coordinate geometry to one O(1), one O(13), one O(15), one O(5), and one O(7) atom. In the fourteenth Na site, Na(14) is bonded in a 3-coordinate geometry to one O(14), one O(16), one O(2), one O(6), and one O(8) atom. In the fifteenth Na site, Na(15) is bonded in a 3-coordinate geometry to one O(1), one O(11), one O(15), one O(5), and one O(9) atom. In the sixteenth Na site, Na(16) is bonded in a 5-coordinate geometry to one O(10), one O(12), one O(16), one O(2), and one O(6) atom. In the seventeenth Na site, Na(17) is bonded in a 3-coordinate geometry to one O(1), one O(11), one O(13), one O(7), and one O(9) atom. In the eighteenth Na site, Na(18) is bonded in a 3-coordinate geometry to one O(10), one O(12), one O(14), one O(2), and one O(8) atom. In the nineteenth Na site, Na(19) is bonded in a 3-coordinate geometry to one O(12), one O(14), one O(3), one O(7), and one O(9) atom. In the twentieth Na site, Na(20) is bonded in a 5-coordinate geometry to one O(10), one O(11), one O(13), one O(4), and one O(8) atom. In the twenty-first Na site, Na(21) is bonded in a 3-coordinate geometry to one O(12), one O(16), one O(3), one O(5), and one O(9) atom. In the twenty-second Na site, Na(22) is bonded in a 3-coordinate geometry to one O(10), one O(11), one O(15), one O(4), and one O(6) atom. In the twenty-third Na site, Na(23) is bonded in a 3-coordinate geometry to one O(14), one O(16), one O(3), one O(5), and one O(7) atom. In the twenty-fourth Na site, Na(24) is bonded in a 3-coordinate geometry to one O(13), one O(15), one O(4), one O(6), and one O(8) atom. There are four inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to one O(1), one O(10), one O(6), and one O(8) atom to form NiO4 tetrahedra that share corners with two equivalent Na(12)O4 trigonal pyramids, corners with two equivalent Na(6)O4 trigonal pyramids,  an edgeedge with one Na(3)O4 trigonal pyramid, and  an edgeedge with one Na(7)O4 trigonal pyramid. In the second Ni site, Ni(2) is bonded to one O(12), one O(14), one O(16), and one O(4) atom to form NiO4 tetrahedra that share corners with two equivalent Na(2)O4 trigonal pyramids, corners with two equivalent Na(4)O4 trigonal pyramids, corners with two equivalent Na(8)O4 trigonal pyramids,  an edgeedge with one Na(12)O4 trigonal pyramid, and  an edgeedge with one Na(6)O4 trigonal pyramid. In the third Ni site, Ni(3) is bonded to one O(2), one O(5), one O(7), and one O(9) atom to form NiO4 tetrahedra that share corners with two equivalent Na(11)O4 trigonal pyramids, corners with two equivalent Na(5)O4 trigonal pyramids, corners with two equivalent Na(9)O4 trigonal pyramids,  an edgeedge with one Na(2)O4 trigonal pyramid,  an edgeedge with one Na(4)O4 trigonal pyramid, and  an edgeedge with one Na(8)O4 trigonal pyramid. In the fourth Ni site, Ni(4) is bonded to one O(11), one O(13), one O(15), and one O(3) atom to form NiO4 tetrahedra that share corners with two equivalent Na(3)O4 trigonal pyramids, corners with two equivalent Na(7)O4 trigonal pyramids,  an edgeedge with one Na(11)O4 trigonal pyramid,  an edgeedge with one Na(5)O4 trigonal pyramid, and  an edgeedge with one Na(9)O4 trigonal pyramid. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a 7-coordinate geometry to one Na(1), one Na(13), one Na(15), one Na(17), one Na(3), one Na(7), and one Ni(1) atom. In the second O site, O(2) is bonded in a 7-coordinate geometry to one Na(14), one Na(16), one Na(18), one Na(2), one Na(4), one Na(8), and one Ni(3) atom. In the third O site, O(3) is bonded in a 7-coordinate geometry to one Na(11), one Na(19), one Na(21), one Na(23), one Na(5), one Na(9), and one Ni(4) atom. In the fourth O site, O(4) is bonded in a 7-coordinate geometry to one Na(10), one Na(12), one Na(20), one Na(22), one Na(24), one Na(6), and one Ni(2) atom. In the fifth O site, O(5) is bonded in a 8-coordinate geometry to one Na(13), one Na(15), one Na(2), one Na(21), one Na(23), one Na(5), one Na(9), and one Ni(3) atom. In the sixth O site, O(6) is bonded in a 8-coordinate geometry to one Na(1), one Na(10), one Na(14), one Na(16), one Na(22), one Na(24), one Na(6), and one Ni(1) atom. In the seventh O site, O(7) is bonded in a 8-coordinate geometry to one Na(11), one Na(13), one Na(17), one Na(19), one Na(23), one Na(4), one Na(5), and one Ni(3) atom. In the eighth O site, O(8) is bonded in a 8-coordinate geometry to one Na(12), one Na(14), one Na(18), one Na(20), one Na(24), one Na(3), one Na(6), and one Ni(1) atom. In the ninth O site, O(9) is bonded in a 8-coordinate geometry to one Na(11), one Na(15), one Na(17), one Na(19), one Na(21), one Na(8), one Na(9), and one Ni(3) atom. In the tenth O site, O(10) is bonded in a 8-coordinate geometry to one Na(10), one Na(12), one Na(16), one Na(18), one Na(20), one Na(22), one Na(7), and one Ni(1) atom. In the eleventh O site, O(11) is bonded in a 8-coordinate geometry to one Na(1), one Na(15), one Na(17), one Na(20), one Na(22), one Na(3), one Na(5), and one Ni(4) atom. In the twelfth O site, O(12) is bonded in a 8-coordinate geometry to one Na(16), one Na(18), one Na(19), one Na(2), one Na(21), one Na(4), one Na(6), and one Ni(2) atom. In the thirteenth O site, O(13) is bonded in a 8-coordinate geometry to one Na(1), one Na(13), one Na(17), one Na(20), one Na(24), one Na(7), one Na(9), and one Ni(4) atom. In the fourteenth O site, O(14) is bonded in a 8-coordinate geometry to one Na(10), one Na(14), one Na(18), one Na(19), one Na(2), one Na(23), one Na(8), and one Ni(2) atom. In the fifteenth O site, O(15) is bonded in a 8-coordinate geometry to one Na(11), one Na(13), one Na(15), one Na(22), one Na(24), one Na(3), one Na(7), and one Ni(4) atom. In the sixteenth O site, O(16) is bonded in a 8-coordinate geometry to one Na(12), one Na(14), one Na(16), one Na(21), one Na(23), one Na(4), one Na(8), and one Ni(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na6NiO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.908
_cell_length_b   7.652
_cell_length_c   7.654
_cell_angle_alpha   60.061
_cell_angle_beta   90.054
_cell_angle_gamma   89.947
_symmetry_Int_Tables_number   1
_cell_volume   299.883
_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  0.033  0.141  0.717  1.0
  Na  Na1  1  0.033  0.716  0.142  1.0
  Na  Na2  1  0.532  0.858  0.857  1.0
  Na  Na3  1  0.033  0.142  0.142  1.0
  Na  Na4  1  0.533  0.283  0.859  1.0
  Na  Na5  1  0.533  0.859  0.284  1.0
  Na  Na6  1  0.366  0.462  0.461  1.0
  Na  Na7  1  0.364  0.072  0.464  1.0
  Na  Na8  1  0.366  0.462  0.076  1.0
  Na  Na9  1  0.863  0.537  0.927  1.0
  Na  Na10  1  0.866  0.924  0.538  1.0
  Na  Na11  1  0.864  0.538  0.537  1.0
  Ni  Ni12  1  0.758  0.332  0.334  1.0
  Ni  Ni13  1  0.257  0.665  0.667  1.0
  O  O14  1  0.094  0.335  0.332  1.0
  O  O15  1  0.593  0.671  0.664  1.0
  O  O16  1  0.643  0.190  0.622  1.0
  O  O17  1  0.644  0.620  0.189  1.0
  O  O18  1  0.644  0.192  0.187  1.0
  O  O19  1  0.145  0.812  0.808  1.0
  O  O20  1  0.143  0.376  0.813  1.0
  O  O21  1  0.146  0.813  0.379  1.0
[/CIF]
.
The compound described by Na6NiO4 is alpha Pu-derived structured and crystallizes in the triclinic P1 space group. There are twenty-four inequivalent Na sites. In the first Na site, Na(1) is bonded in a 4-coordinate geometry to one O(1), one O(11), one O(13), and one O(6) atom. In the second Na site, Na(2) is bonded to one O(12), one O(14), one O(2), and one O(5) atom to form distorted NaO4 trigonal pyramids that share corners with two equivalent Ni(2)O4 tetrahedra,  a cornercorner with one Na(5)O4 trigonal pyramid,  a cornercorner with one Na(6)O4 trigonal pyramid,  a cornercorner with one Na(9)O4 trigonal pyramid, corners with two equivalent Na(4)O4 trigonal pyramids, corners with two equivalent Na(8)O4 trigonal pyramids, and  an edgeedge with one Ni(3)O4 tetrahedra. In the third Na site, Na(3) is bonded to one O(1), one O(11), one O(15), and one O(8) atom to form distorted NaO4 trigonal pyramids that share corners with two equivalent Ni(4)O4 tetrahedra,  a cornercorner with one Na(11)O4 trigonal pyramid,  a cornercorner with one Na(12)O4 trigonal pyramid,  a cornercorner with one Na(5)O4 trigonal pyramid,  a cornercorner with one Na(6)O4 trigonal pyramid, corners with two equivalent Na(7)O4 trigonal pyramids, and  an edgeedge with one Ni(1)O4 tetrahedra. In the fourth Na site, Na(4) is bonded to one O(12), one O(16), one O(2), and one O(7) atom to form distorted NaO4 trigonal pyramids that share corners with two equivalent Ni(2)O4 tetrahedra,  a cornercorner with one Na(11)O4 trigonal pyramid,  a cornercorner with one Na(12)O4 trigonal pyramid,  a cornercorner with one Na(5)O4 trigonal pyramid,  a cornercorner with one Na(6)O4 trigonal pyramid, corners with two equivalent Na(2)O4 trigonal pyramids, corners with two equivalent Na(8)O4 trigonal pyramids, and  an edgeedge with one Ni(3)O4 tetrahedra. In the fifth Na site, Na(5) is bonded to one O(11), one O(3), one O(5), and one O(7) atom to form distorted NaO4 trigonal pyramids that share corners with two equivalent Ni(3)O4 tetrahedra,  a cornercorner with one Na(2)O4 trigonal pyramid,  a cornercorner with one Na(3)O4 trigonal pyramid,  a cornercorner with one Na(4)O4 trigonal pyramid, corners with two equivalent Na(11)O4 trigonal pyramids, corners with two equivalent Na(9)O4 trigonal pyramids, and  an edgeedge with one Ni(4)O4 tetrahedra. In the sixth Na site, Na(6) is bonded to one O(12), one O(4), one O(6), and one O(8) atom to form distorted NaO4 trigonal pyramids that share corners with two equivalent Ni(1)O4 tetrahedra,  a cornercorner with one Na(2)O4 trigonal pyramid,  a cornercorner with one Na(3)O4 trigonal pyramid,  a cornercorner with one Na(4)O4 trigonal pyramid, corners with two equivalent Na(12)O4 trigonal pyramids, and  an edgeedge with one Ni(2)O4 tetrahedra. In the seventh Na site, Na(7) is bonded to one O(1), one O(10), one O(13), and one O(15) atom to form distorted NaO4 trigonal pyramids that share corners with two equivalent Ni(4)O4 tetrahedra,  a cornercorner with one Na(11)O4 trigonal pyramid,  a cornercorner with one Na(12)O4 trigonal pyramid,  a cornercorner with one Na(9)O4 trigonal pyramid, corners with two equivalent Na(3)O4 trigonal pyramids, and  an edgeedge with one Ni(1)O4 tetrahedra. In the eighth Na site, Na(8) is bonded to one O(14), one O(16), one O(2), and one O(9) atom to form distorted NaO4 trigonal pyramids that share corners with two equivalent Ni(2)O4 tetrahedra,  a cornercorner with one Na(11)O4 trigonal pyramid,  a cornercorner with one Na(12)O4 trigonal pyramid,  a cornercorner with one Na(9)O4 trigonal pyramid, corners with two equivalent Na(2)O4 trigonal pyramids, corners with two equivalent Na(4)O4 trigonal pyramids, and  an edgeedge with one Ni(3)O4 tetrahedra. In the ninth Na site, Na(9) is bonded to one O(13), one O(3), one O(5), and one O(9) atom to form distorted NaO4 trigonal pyramids that share corners with two equivalent Ni(3)O4 tetrahedra,  a cornercorner with one Na(2)O4 trigonal pyramid,  a cornercorner with one Na(7)O4 trigonal pyramid,  a cornercorner with one Na(8)O4 trigonal pyramid, corners with two equivalent Na(11)O4 trigonal pyramids, corners with two equivalent Na(5)O4 trigonal pyramids, and  an edgeedge with one Ni(4)O4 tetrahedra. In the tenth Na site, Na(10) is bonded in a 4-coordinate geometry to one O(10), one O(14), one O(4), and one O(6) atom. In the eleventh Na site, Na(11) is bonded to one O(15), one O(3), one O(7), and one O(9) atom to form distorted NaO4 trigonal pyramids that share corners with two equivalent Ni(3)O4 tetrahedra,  a cornercorner with one Na(3)O4 trigonal pyramid,  a cornercorner with one Na(4)O4 trigonal pyramid,  a cornercorner with one Na(7)O4 trigonal pyramid,  a cornercorner with one Na(8)O4 trigonal pyramid, corners with two equivalent Na(5)O4 trigonal pyramids, corners with two equivalent Na(9)O4 trigonal pyramids, and  an edgeedge with one Ni(4)O4 tetrahedra. In the twelfth Na site, Na(12) is bonded to one O(10), one O(16), one O(4), and one O(8) atom to form distorted NaO4 trigonal pyramids that share corners with two equivalent Ni(1)O4 tetrahedra,  a cornercorner with one Na(3)O4 trigonal pyramid,  a cornercorner with one Na(4)O4 trigonal pyramid,  a cornercorner with one Na(7)O4 trigonal pyramid,  a cornercorner with one Na(8)O4 trigonal pyramid, corners with two equivalent Na(6)O4 trigonal pyramids, and  an edgeedge with one Ni(2)O4 tetrahedra. In the thirteenth Na site, Na(13) is bonded in a 3-coordinate geometry to one O(1), one O(13), one O(15), one O(5), and one O(7) atom. In the fourteenth Na site, Na(14) is bonded in a 3-coordinate geometry to one O(14), one O(16), one O(2), one O(6), and one O(8) atom. In the fifteenth Na site, Na(15) is bonded in a 3-coordinate geometry to one O(1), one O(11), one O(15), one O(5), and one O(9) atom. In the sixteenth Na site, Na(16) is bonded in a 5-coordinate geometry to one O(10), one O(12), one O(16), one O(2), and one O(6) atom. In the seventeenth Na site, Na(17) is bonded in a 3-coordinate geometry to one O(1), one O(11), one O(13), one O(7), and one O(9) atom. In the eighteenth Na site, Na(18) is bonded in a 3-coordinate geometry to one O(10), one O(12), one O(14), one O(2), and one O(8) atom. In the nineteenth Na site, Na(19) is bonded in a 3-coordinate geometry to one O(12), one O(14), one O(3), one O(7), and one O(9) atom. In the twentieth Na site, Na(20) is bonded in a 5-coordinate geometry to one O(10), one O(11), one O(13), one O(4), and one O(8) atom. In the twenty-first Na site, Na(21) is bonded in a 3-coordinate geometry to one O(12), one O(16), one O(3), one O(5), and one O(9) atom. In the twenty-second Na site, Na(22) is bonded in a 3-coordinate geometry to one O(10), one O(11), one O(15), one O(4), and one O(6) atom. In the twenty-third Na site, Na(23) is bonded in a 3-coordinate geometry to one O(14), one O(16), one O(3), one O(5), and one O(7) atom. In the twenty-fourth Na site, Na(24) is bonded in a 3-coordinate geometry to one O(13), one O(15), one O(4), one O(6), and one O(8) atom. There are four inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to one O(1), one O(10), one O(6), and one O(8) atom to form NiO4 tetrahedra that share corners with two equivalent Na(12)O4 trigonal pyramids, corners with two equivalent Na(6)O4 trigonal pyramids,  an edgeedge with one Na(3)O4 trigonal pyramid, and  an edgeedge with one Na(7)O4 trigonal pyramid. In the second Ni site, Ni(2) is bonded to one O(12), one O(14), one O(16), and one O(4) atom to form NiO4 tetrahedra that share corners with two equivalent Na(2)O4 trigonal pyramids, corners with two equivalent Na(4)O4 trigonal pyramids, corners with two equivalent Na(8)O4 trigonal pyramids,  an edgeedge with one Na(12)O4 trigonal pyramid, and  an edgeedge with one Na(6)O4 trigonal pyramid. In the third Ni site, Ni(3) is bonded to one O(2), one O(5), one O(7), and one O(9) atom to form NiO4 tetrahedra that share corners with two equivalent Na(11)O4 trigonal pyramids, corners with two equivalent Na(5)O4 trigonal pyramids, corners with two equivalent Na(9)O4 trigonal pyramids,  an edgeedge with one Na(2)O4 trigonal pyramid,  an edgeedge with one Na(4)O4 trigonal pyramid, and  an edgeedge with one Na(8)O4 trigonal pyramid. In the fourth Ni site, Ni(4) is bonded to one O(11), one O(13), one O(15), and one O(3) atom to form NiO4 tetrahedra that share corners with two equivalent Na(3)O4 trigonal pyramids, corners with two equivalent Na(7)O4 trigonal pyramids,  an edgeedge with one Na(11)O4 trigonal pyramid,  an edgeedge with one Na(5)O4 trigonal pyramid, and  an edgeedge with one Na(9)O4 trigonal pyramid. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a 7-coordinate geometry to one Na(1), one Na(13), one Na(15), one Na(17), one Na(3), one Na(7), and one Ni(1) atom. In the second O site, O(2) is bonded in a 7-coordinate geometry to one Na(14), one Na(16), one Na(18), one Na(2), one Na(4), one Na(8), and one Ni(3) atom. In the third O site, O(3) is bonded in a 7-coordinate geometry to one Na(11), one Na(19), one Na(21), one Na(23), one Na(5), one Na(9), and one Ni(4) atom. In the fourth O site, O(4) is bonded in a 7-coordinate geometry to one Na(10), one Na(12), one Na(20), one Na(22), one Na(24), one Na(6), and one Ni(2) atom. In the fifth O site, O(5) is bonded in a 8-coordinate geometry to one Na(13), one Na(15), one Na(2), one Na(21), one Na(23), one Na(5), one Na(9), and one Ni(3) atom. In the sixth O site, O(6) is bonded in a 8-coordinate geometry to one Na(1), one Na(10), one Na(14), one Na(16), one Na(22), one Na(24), one Na(6), and one Ni(1) atom. In the seventh O site, O(7) is bonded in a 8-coordinate geometry to one Na(11), one Na(13), one Na(17), one Na(19), one Na(23), one Na(4), one Na(5), and one Ni(3) atom. In the eighth O site, O(8) is bonded in a 8-coordinate geometry to one Na(12), one Na(14), one Na(18), one Na(20), one Na(24), one Na(3), one Na(6), and one Ni(1) atom. In the ninth O site, O(9) is bonded in a 8-coordinate geometry to one Na(11), one Na(15), one Na(17), one Na(19), one Na(21), one Na(8), one Na(9), and one Ni(3) atom. In the tenth O site, O(10) is bonded in a 8-coordinate geometry to one Na(10), one Na(12), one Na(16), one Na(18), one Na(20), one Na(22), one Na(7), and one Ni(1) atom. In the eleventh O site, O(11) is bonded in a 8-coordinate geometry to one Na(1), one Na(15), one Na(17), one Na(20), one Na(22), one Na(3), one Na(5), and one Ni(4) atom. In the twelfth O site, O(12) is bonded in a 8-coordinate geometry to one Na(16), one Na(18), one Na(19), one Na(2), one Na(21), one Na(4), one Na(6), and one Ni(2) atom. In the thirteenth O site, O(13) is bonded in a 8-coordinate geometry to one Na(1), one Na(13), one Na(17), one Na(20), one Na(24), one Na(7), one Na(9), and one Ni(4) atom. In the fourteenth O site, O(14) is bonded in a 8-coordinate geometry to one Na(10), one Na(14), one Na(18), one Na(19), one Na(2), one Na(23), one Na(8), and one Ni(2) atom. In the fifteenth O site, O(15) is bonded in a 8-coordinate geometry to one Na(11), one Na(13), one Na(15), one Na(22), one Na(24), one Na(3), one Na(7), and one Ni(4) atom. In the sixteenth O site, O(16) is bonded in a 8-coordinate geometry to one Na(12), one Na(14), one Na(16), one Na(21), one Na(23), one Na(4), one Na(8), and one Ni(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na6NiO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.908
_cell_length_b   7.652
_cell_length_c   7.654
_cell_angle_alpha   60.061
_cell_angle_beta   90.054
_cell_angle_gamma   89.947
_symmetry_Int_Tables_number   1
_cell_volume   299.883
_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  0.033  0.141  0.717  1.0
  Na  Na1  1  0.033  0.716  0.142  1.0
  Na  Na2  1  0.532  0.858  0.857  1.0
  Na  Na3  1  0.033  0.142  0.142  1.0
  Na  Na4  1  0.533  0.283  0.859  1.0
  Na  Na5  1  0.533  0.859  0.284  1.0
  Na  Na6  1  0.366  0.462  0.461  1.0
  Na  Na7  1  0.364  0.072  0.464  1.0
  Na  Na8  1  0.366  0.462  0.076  1.0
  Na  Na9  1  0.863  0.537  0.927  1.0
  Na  Na10  1  0.866  0.924  0.538  1.0
  Na  Na11  1  0.864  0.538  0.537  1.0
  Ni  Ni12  1  0.758  0.332  0.334  1.0
  Ni  Ni13  1  0.257  0.665  0.667  1.0
  O  O14  1  0.094  0.335  0.332  1.0
  O  O15  1  0.593  0.671  0.664  1.0
  O  O16  1  0.643  0.190  0.622  1.0
  O  O17  1  0.644  0.620  0.189  1.0
  O  O18  1  0.644  0.192  0.187  1.0
  O  O19  1  0.145  0.812  0.808  1.0
  O  O20  1  0.143  0.376  0.813  1.0
  O  O21  1  0.146  0.813  0.379  1.0
[/CIF]
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