data_NaPbW2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.27
_cell_length_b   3.27
_cell_length_c   8.65
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaPbW2
_chemical_formula_sum   'Na1 Pb1 W2'
_cell_volume   92.58
_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  0.98  1.0
  Pb  Pb1  1  0.64  0.64  0.9  1.0
  W  W2  1  0.0  0.0  0.45  1.0
  W  W3  1  0.64  0.64  0.64  1.0

data_NaPbW2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.63
_cell_length_b   4.63
_cell_length_c   8.65
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   NaPbW2
_chemical_formula_sum   'Na2 Pb2 W4'
_cell_volume   185.15
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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  2  0.0  0.0  0.98  1.0
  Pb  Pb1  2  0.14  0.5  0.9  1.0
  W  W2  2  0.0  0.0  0.45  1.0
  W  W3  2  0.14  0.5  0.64  1.0

Na Pb W W
Na Pb W W 0 1 - - o 1 3 o o o 2 3 - - o 2 3 - o o 2 3 o - o 
NaW2Pb crystallizes in the monoclinic Cm space group. Na(1) is bonded in a 1-coordinate geometry to one W(1) and four equivalent Pb(1) atoms. The Na(1)-W(1) bond length is 4.01 Å. There are a spread of Na(1)-Pb(1) bond distances ranging from 1.84-3.03 Å. There are two inequivalent W sites. In the first W site, W(1) is bonded in a 9-coordinate geometry to one Na(1), four equivalent W(1), and four equivalent W(2) atoms. All W(1)-W(1) bond lengths are 3.27 Å. There are a spread of W(1)-W(2) bond distances ranging from 2.39-3.40 Å. In the second W site, W(2) is bonded in a 2-coordinate geometry to four equivalent W(1) and one Pb(1) atom. The W(2)-Pb(1) bond length is 2.21 Å. Pb(1) is bonded in a 5-coordinate geometry to four equivalent Na(1) and one W(2) atom.