data_NaPb2W
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.26
_cell_length_b   5.26
_cell_length_c   5.26
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaPb2W
_chemical_formula_sum   'Na1 Pb2 W1'
_cell_volume   102.93
_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  Na0  1  0.0  0.0  0.0  1.0
  Pb  Pb1  1  0.72  0.72  0.72  1.0
  Pb  Pb2  1  0.86  0.86  0.86  1.0
  W  W3  1  0.58  0.58  0.58  1.0

data_NaPb2W
_symmetry_space_group_name_H-M   R3m
_cell_length_a   5.26
_cell_length_b   5.26
_cell_length_c   12.89
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   NaPb2W
_chemical_formula_sum   'Na3 Pb6 W3'
_cell_volume   308.78
_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
  Pb  Pb1  3  0.0  0.0  0.14  1.0
  Pb  Pb2  3  0.0  0.0  0.28  1.0
  W  W3  3  0.0  0.0  0.42  1.0

Na Pb Pb W
NaWPb2 crystallizes in the trigonal R3m space group. Na(1) is bonded in a single-bond geometry to one Pb(2) and three equivalent Pb(1) atoms. The Na(1)-Pb(2) bond length is 1.81 Å. All Na(1)-Pb(1) bond lengths are 3.11 Å. W(1) is bonded in a single-bond geometry to one Pb(1) atom. The W(1)-Pb(1) bond length is 1.81 Å. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded to three equivalent Na(1), one W(1), and one Pb(2) atom to form distorted corner-sharing PbNa3PbW trigonal bipyramids. The Pb(1)-Pb(2) bond length is 1.81 Å. In the second Pb site, Pb(2) is bonded in a distorted single-bond geometry to one Na(1) and one Pb(1) atom.