data_NaNiBiPb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.18
_cell_length_b   5.18
_cell_length_c   5.18
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaNiBiPb
_chemical_formula_sum   'Na1 Ni1 Bi1 Pb1'
_cell_volume   98.12
_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  Na1  1  0.0  0.0  0.0  1.0
  Ni  Ni2  1  0.49  0.49  0.49  1.0
  Bi  Bi0  1  0.83  0.83  0.83  1.0
  Pb  Pb3  1  0.66  0.66  0.66  1.0

data_NaNiBiPb
_symmetry_space_group_name_H-M   R3m
_cell_length_a   5.18
_cell_length_b   5.18
_cell_length_c   12.68
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   NaNiBiPb
_chemical_formula_sum   'Na3 Ni3 Bi3 Pb3'
_cell_volume   294.36
_cell_formula_units_Z   3
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-y, x-y, z'
  3  '-x+y, -x, z'
  4  '-y, -x, z'
  5  '-x+y, y, z'
  6  'x, x-y, z'
  7  'x+1/3, y+2/3, z+2/3'
  8  '-y+1/3, x-y+2/3, z+2/3'
  9  '-x+y+1/3, -x+2/3, z+2/3'
  10  '-y+1/3, -x+2/3, z+2/3'
  11  '-x+y+1/3, y+2/3, z+2/3'
  12  'x+1/3, x-y+2/3, z+2/3'
  13  'x+2/3, y+1/3, z+1/3'
  14  '-y+2/3, x-y+1/3, z+1/3'
  15  '-x+y+2/3, -x+1/3, z+1/3'
  16  '-y+2/3, -x+1/3, z+1/3'
  17  '-x+y+2/3, y+1/3, z+1/3'
  18  'x+2/3, x-y+1/3, z+1/3'
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  3  0.0  0.0  0.0  1.0
  Ni  Ni1  3  0.0  0.0  0.51  1.0
  Bi  Bi2  3  0.0  0.0  0.17  1.0
  Pb  Pb3  3  0.0  0.0  0.34  1.0

Na Ni Bi Pb
NaNiPbBi crystallizes in the trigonal R3m space group. Na(1) is bonded to three equivalent Pb(1) and one Bi(1) atom to form distorted NaBiPb3 trigonal pyramids that share  a cornercorner with one Pb(1)Na3NiBi trigonal bipyramid and corners with six equivalent Na(1)BiPb3 trigonal pyramids. All Na(1)-Pb(1) bond lengths are 2.99 Å. The Na(1)-Bi(1) bond length is 2.15 Å. Ni(1) is bonded in a distorted single-bond geometry to one Pb(1) atom. The Ni(1)-Pb(1) bond length is 2.15 Å. Pb(1) is bonded to three equivalent Na(1), one Ni(1), and one Bi(1) atom to form PbNa3NiBi trigonal bipyramids that share corners with six equivalent Pb(1)Na3NiBi trigonal bipyramids and  a cornercorner with one Na(1)BiPb3 trigonal pyramid. The Pb(1)-Bi(1) bond length is 2.15 Å. Bi(1) is bonded in a distorted linear geometry to one Na(1) and one Pb(1) atom.