data_Pb3WC
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.84
_cell_length_b   4.84
_cell_length_c   4.84
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Pb3WC
_chemical_formula_sum   'Pb3 W1 C1'
_cell_volume   113.73
_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
  Pb  Pb0  1  0.0  0.42  0.0  1.0
  Pb  Pb1  1  0.0  0.0  0.42  1.0
  Pb  Pb2  1  0.42  0.0  0.0  1.0
  W  W4  1  0.42  0.42  0.42  1.0
  C  C3  1  0.0  0.0  0.0  1.0

data_Pb3WC
_symmetry_space_group_name_H-M   R3m
_cell_length_a   6.85
_cell_length_b   6.85
_cell_length_c   8.39
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   Pb3WC
_chemical_formula_sum   'Pb9 W3 C3'
_cell_volume   341.18
_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
  Pb  Pb0  9  0.19  0.39  0.81  1.0
  W  W1  3  0.0  0.0  0.42  1.0
  C  C2  3  0.0  0.0  0.0  1.0

Pb Pb Pb W C
WPb3C crystallizes in the trigonal R3m space group. W(1) is bonded in a 9-coordinate geometry to nine equivalent Pb(1) atoms. There are three shorter (2.89 Å) and six longer (3.47 Å) W(1)-Pb(1) bond lengths. Pb(1) is bonded in a distorted single-bond geometry to three equivalent W(1) and two equivalent C(1) atoms. There is one shorter (2.05 Å) and one longer (2.80 Å) Pb(1)-C(1) bond length. C(1) is bonded to six equivalent Pb(1) atoms to form distorted corner-sharing CPb6 octahedra. The corner-sharing octahedra are not tilted.