The compound described by Na6PbO4 crystallizes in the cubic I-43m space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(2) and three equivalent O(1) atoms to form NaO4 tetrahedra that share  a cornercorner with one Pb(1)O4 tetrahedra, corners with three equivalent Na(2)O4 tetrahedra, corners with nine equivalent Na(1)O4 tetrahedra,  an edgeedge with one Pb(1)O4 tetrahedra, and edges with five equivalent Na(2)O4 tetrahedra. In the second Na site, Na(2) is bonded to one O(2) and three equivalent O(1) atoms to form distorted NaO4 tetrahedra that share corners with three equivalent Na(1)O4 tetrahedra, corners with three equivalent Pb(1)O4 tetrahedra, corners with nine equivalent Na(2)O4 tetrahedra, and edges with five equivalent Na(1)O4 tetrahedra. Pb(1) is bonded to one O(3) and three equivalent O(1) atoms to form distorted PbO4 tetrahedra that share corners with three equivalent Na(1)O4 tetrahedra, corners with three equivalent Pb(1)O4 tetrahedra, corners with nine equivalent Na(2)O4 tetrahedra, and edges with three equivalent Na(1)O4 tetrahedra. There are three inequivalent O sites. In the first O site, O(3) is bonded to four equivalent Pb(1) atoms to form corner-sharing OPb4 tetrahedra. In the second O site, O(1) is bonded to three equivalent Na(1), three equivalent Na(2), and one Pb(1) atom to form distorted ONa6Pb pentagonal bipyramids that share corners with two equivalent O(1)Na6Pb pentagonal bipyramids,  a cornercorner with one O(3)Pb4 tetrahedra, and edges with six equivalent O(1)Na6Pb pentagonal bipyramids. In the third O site, O(2) is bonded in a distorted body-centered cubic geometry to four equivalent Na(1) and four equivalent Na(2) atoms. is represented by the CIF card [CIF]
data_Na6PbO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.786
_cell_length_b   9.786
_cell_length_c   9.786
_cell_angle_alpha   109.471
_cell_angle_beta   109.471
_cell_angle_gamma   109.471
_symmetry_Int_Tables_number   1
_cell_volume   721.356
_cell_formula_units_Z   4
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  0.468  0.743  0.468  1.0
  Na  Na1  1  0.725  0.725  0.257  1.0
  Na  Na2  1  0.234  0.454  0.454  1.0
  Na  Na3  1  0.257  0.725  0.725  1.0
  Na  Na4  1  0.780  0.000  0.546  1.0
  Na  Na5  1  0.532  0.000  0.275  1.0
  Na  Na6  1  0.454  0.454  0.234  1.0
  Na  Na7  1  0.766  0.220  0.220  1.0
  Na  Na8  1  0.546  0.000  0.780  1.0
  Na  Na9  1  0.454  0.234  0.454  1.0
  Na  Na10  1  0.725  0.257  0.725  1.0
  Na  Na11  1  0.000  0.780  0.546  1.0
  Na  Na12  1  0.743  0.468  0.468  1.0
  Na  Na13  1  0.468  0.468  0.743  1.0
  Na  Na14  1  0.000  0.275  0.532  1.0
  Na  Na15  1  0.532  0.275  0.000  1.0
  Na  Na16  1  0.275  0.532  0.000  1.0
  Na  Na17  1  0.546  0.780  0.000  1.0
  Na  Na18  1  0.220  0.766  0.220  1.0
  Na  Na19  1  0.275  0.000  0.532  1.0
  Na  Na20  1  0.220  0.220  0.766  1.0
  Na  Na21  1  0.000  0.546  0.780  1.0
  Na  Na22  1  0.780  0.546  0.000  1.0
  Na  Na23  1  0.000  0.532  0.275  1.0
  Pb  Pb24  1  0.000  0.000  0.254  1.0
  Pb  Pb25  1  0.000  0.254  0.000  1.0
  Pb  Pb26  1  0.746  0.746  0.746  1.0
  Pb  Pb27  1  0.254  0.000  0.000  1.0
  O  O28  1  0.000  0.769  0.286  1.0
  O  O29  1  0.500  0.500  0.000  1.0
  O  O30  1  0.000  0.286  0.769  1.0
  O  O31  1  0.231  0.231  0.518  1.0
  O  O32  1  0.714  0.714  0.482  1.0
  O  O33  1  0.769  0.286  0.000  1.0
  O  O34  1  0.769  0.000  0.286  1.0
  O  O35  1  0.231  0.518  0.231  1.0
  O  O36  1  0.000  0.500  0.500  1.0
  O  O37  1  0.518  0.231  0.231  1.0
  O  O38  1  0.482  0.714  0.714  1.0
  O  O39  1  0.286  0.769  0.000  1.0
  O  O40  1  0.286  0.000  0.769  1.0
  O  O41  1  0.000  0.000  0.000  1.0
  O  O42  1  0.714  0.482  0.714  1.0
  O  O43  1  0.500  0.000  0.500  1.0
[/CIF]
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The compound described by Na6PbO4 crystallizes in the cubic I-43m space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(2) and three equivalent O(1) atoms to form NaO4 tetrahedra that share  a cornercorner with one Pb(1)O4 tetrahedra, corners with three equivalent Na(2)O4 tetrahedra, corners with nine equivalent Na(1)O4 tetrahedra,  an edgeedge with one Pb(1)O4 tetrahedra, and edges with five equivalent Na(2)O4 tetrahedra. In the second Na site, Na(2) is bonded to one O(2) and three equivalent O(1) atoms to form distorted NaO4 tetrahedra that share corners with three equivalent Na(1)O4 tetrahedra, corners with three equivalent Pb(1)O4 tetrahedra, corners with nine equivalent Na(2)O4 tetrahedra, and edges with five equivalent Na(1)O4 tetrahedra. Pb(1) is bonded to one O(3) and three equivalent O(1) atoms to form distorted PbO4 tetrahedra that share corners with three equivalent Na(1)O4 tetrahedra, corners with three equivalent Pb(1)O4 tetrahedra, corners with nine equivalent Na(2)O4 tetrahedra, and edges with three equivalent Na(1)O4 tetrahedra. There are three inequivalent O sites. In the first O site, O(3) is bonded to four equivalent Pb(1) atoms to form corner-sharing OPb4 tetrahedra. In the second O site, O(1) is bonded to three equivalent Na(1), three equivalent Na(2), and one Pb(1) atom to form distorted ONa6Pb pentagonal bipyramids that share corners with two equivalent O(1)Na6Pb pentagonal bipyramids,  a cornercorner with one O(3)Pb4 tetrahedra, and edges with six equivalent O(1)Na6Pb pentagonal bipyramids. In the third O site, O(2) is bonded in a distorted body-centered cubic geometry to four equivalent Na(1) and four equivalent Na(2) atoms. is represented by the CIF card [CIF]
data_Na6PbO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.786
_cell_length_b   9.786
_cell_length_c   9.786
_cell_angle_alpha   109.471
_cell_angle_beta   109.471
_cell_angle_gamma   109.471
_symmetry_Int_Tables_number   1
_cell_volume   721.356
_cell_formula_units_Z   4
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  0.468  0.743  0.468  1.0
  Na  Na1  1  0.725  0.725  0.257  1.0
  Na  Na2  1  0.234  0.454  0.454  1.0
  Na  Na3  1  0.257  0.725  0.725  1.0
  Na  Na4  1  0.780  0.000  0.546  1.0
  Na  Na5  1  0.532  0.000  0.275  1.0
  Na  Na6  1  0.454  0.454  0.234  1.0
  Na  Na7  1  0.766  0.220  0.220  1.0
  Na  Na8  1  0.546  0.000  0.780  1.0
  Na  Na9  1  0.454  0.234  0.454  1.0
  Na  Na10  1  0.725  0.257  0.725  1.0
  Na  Na11  1  0.000  0.780  0.546  1.0
  Na  Na12  1  0.743  0.468  0.468  1.0
  Na  Na13  1  0.468  0.468  0.743  1.0
  Na  Na14  1  0.000  0.275  0.532  1.0
  Na  Na15  1  0.532  0.275  0.000  1.0
  Na  Na16  1  0.275  0.532  0.000  1.0
  Na  Na17  1  0.546  0.780  0.000  1.0
  Na  Na18  1  0.220  0.766  0.220  1.0
  Na  Na19  1  0.275  0.000  0.532  1.0
  Na  Na20  1  0.220  0.220  0.766  1.0
  Na  Na21  1  0.000  0.546  0.780  1.0
  Na  Na22  1  0.780  0.546  0.000  1.0
  Na  Na23  1  0.000  0.532  0.275  1.0
  Pb  Pb24  1  0.000  0.000  0.254  1.0
  Pb  Pb25  1  0.000  0.254  0.000  1.0
  Pb  Pb26  1  0.746  0.746  0.746  1.0
  Pb  Pb27  1  0.254  0.000  0.000  1.0
  O  O28  1  0.000  0.769  0.286  1.0
  O  O29  1  0.500  0.500  0.000  1.0
  O  O30  1  0.000  0.286  0.769  1.0
  O  O31  1  0.231  0.231  0.518  1.0
  O  O32  1  0.714  0.714  0.482  1.0
  O  O33  1  0.769  0.286  0.000  1.0
  O  O34  1  0.769  0.000  0.286  1.0
  O  O35  1  0.231  0.518  0.231  1.0
  O  O36  1  0.000  0.500  0.500  1.0
  O  O37  1  0.518  0.231  0.231  1.0
  O  O38  1  0.482  0.714  0.714  1.0
  O  O39  1  0.286  0.769  0.000  1.0
  O  O40  1  0.286  0.000  0.769  1.0
  O  O41  1  0.000  0.000  0.000  1.0
  O  O42  1  0.714  0.482  0.714  1.0
  O  O43  1  0.500  0.000  0.500  1.0
[/CIF]
.