data_NaIrPb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.63
_cell_length_b   4.63
_cell_length_c   4.63
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaIrPb
_chemical_formula_sum   'Na1 Ir1 Pb1'
_cell_volume   70.06
_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
  Ir  Ir0  1  0.27  0.27  0.27  1.0
  Pb  Pb2  1  0.64  0.64  0.64  1.0

data_NaIrPb
_symmetry_space_group_name_H-M   R3m
_cell_length_a   4.63
_cell_length_b   4.63
_cell_length_c   11.33
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   NaIrPb
_chemical_formula_sum   'Na3 Ir3 Pb3'
_cell_volume   210.18
_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
  Ir  Ir1  3  0.0  0.0  0.73  1.0
  Pb  Pb2  3  0.0  0.0  0.36  1.0

Na Ir Pb
NaIrPb crystallizes in the trigonal R3m space group. Na(1) is bonded to four equivalent Ir(1) and three equivalent Pb(1) atoms to form NaIr4Pb3 hexagonal pyramids that share corners with three equivalent Ir(1)Na4Pb3 hexagonal pyramids, corners with six equivalent Na(1)Ir4Pb3 hexagonal pyramids, edges with three equivalent Ir(1)Na4Pb3 hexagonal pyramids, and edges with six equivalent Na(1)Ir4Pb3 hexagonal pyramids. There are three shorter (2.76 Å) and one longer (3.08 Å) Na(1)-Ir(1) bond length. All Na(1)-Pb(1) bond lengths are 2.69 Å. Ir(1) is bonded to four equivalent Na(1) and three equivalent Pb(1) atoms to form distorted IrNa4Pb3 hexagonal pyramids that share corners with three equivalent Na(1)Ir4Pb3 hexagonal pyramids, corners with six equivalent Ir(1)Na4Pb3 hexagonal pyramids, edges with three equivalent Na(1)Ir4Pb3 hexagonal pyramids, and edges with six equivalent Ir(1)Na4Pb3 hexagonal pyramids. All Ir(1)-Pb(1) bond lengths are 2.69 Å. Pb(1) is bonded in a distorted hexagonal planar geometry to three equivalent Na(1) and three equivalent Ir(1) atoms.