data_NaGa2Pb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.19
_cell_length_b   5.19
_cell_length_c   5.19
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaGa2Pb
_chemical_formula_sum   'Na1 Ga2 Pb1'
_cell_volume   98.94
_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  Na2  1  0.0  0.0  0.0  1.0
  Ga  Ga0  1  0.84  0.84  0.84  1.0
  Ga  Ga1  1  0.51  0.51  0.51  1.0
  Pb  Pb3  1  0.67  0.67  0.67  1.0

data_NaGa2Pb
_symmetry_space_group_name_H-M   R3m
_cell_length_a   5.19
_cell_length_b   5.19
_cell_length_c   12.72
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   NaGa2Pb
_chemical_formula_sum   'Na3 Ga6 Pb3'
_cell_volume   296.82
_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
  Ga  Ga1  3  0.0  0.0  0.16  1.0
  Ga  Ga2  3  0.0  0.0  0.49  1.0
  Pb  Pb3  3  0.0  0.0  0.33  1.0

Na Ga Ga Pb
NaGa2Pb crystallizes in the trigonal R3m space group. Na(1) is bonded to one Ga(1) and three equivalent Pb(1) atoms to form NaGaPb3 trigonal pyramids that share  a cornercorner with one Pb(1)Na3Ga2 trigonal bipyramid and corners with six equivalent Na(1)GaPb3 trigonal pyramids. The Na(1)-Ga(1) bond length is 2.09 Å. All Na(1)-Pb(1) bond lengths are 3.00 Å. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a linear geometry to one Na(1) and one Pb(1) atom. The Ga(1)-Pb(1) bond length is 2.09 Å. In the second Ga site, Ga(2) is bonded in a single-bond geometry to one Pb(1) atom. The Ga(2)-Pb(1) bond length is 2.09 Å. Pb(1) is bonded to three equivalent Na(1), one Ga(1), and one Ga(2) atom to form PbNa3Ga2 trigonal bipyramids that share corners with six equivalent Pb(1)Na3Ga2 trigonal bipyramids and  a cornercorner with one Na(1)GaPb3 trigonal pyramid.