data_Sb3W
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.67
_cell_length_b   5.67
_cell_length_c   5.67
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Sb3W
_chemical_formula_sum   'Sb6 W2'
_cell_volume   181.9
_cell_formula_units_Z   2
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
  Sb  Sb0  1  0.42  0.0  0.83  1.0
  Sb  Sb1  1  0.25  0.0  0.83  1.0
  Sb  Sb2  1  0.83  0.42  0.0  1.0
  Sb  Sb3  1  0.83  0.25  0.0  1.0
  Sb  Sb4  1  0.0  0.83  0.25  1.0
  Sb  Sb5  1  0.0  0.83  0.42  1.0
  W  W6  1  0.83  0.83  0.83  1.0
  W  W7  1  0.0  0.0  0.0  1.0

data_Sb3W
_symmetry_space_group_name_H-M   R3
_cell_length_a   8.01
_cell_length_b   8.01
_cell_length_c   9.81
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   146
_chemical_formula_structural   Sb3W
_chemical_formula_sum   'Sb18 W6'
_cell_volume   545.7
_cell_formula_units_Z   6
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  'x+1/3, y+2/3, z+2/3'
  5  '-y+1/3, x-y+2/3, z+2/3'
  6  '-x+y+1/3, -x+2/3, z+2/3'
  7  'x+2/3, y+1/3, z+1/3'
  8  '-y+2/3, x-y+1/3, z+1/3'
  9  '-x+y+2/3, -x+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
  Sb  Sb0  9  0.0  0.58  0.42  1.0
  Sb  Sb1  9  0.14  0.69  0.69  1.0
  W  W2  3  0.0  0.0  0.0  1.0
  W  W3  3  0.0  0.0  0.83  1.0

Sb Sb Sb Sb Sb Sb W W
Sb Sb Sb Sb Sb Sb W W 0 1 o o o 1 7 o o + 2 3 o o o 3 7 + o o 4 5 o o o 4 7 o + o 6 7 + + + 
WSb3 crystallizes in the trigonal R3 space group. There are two inequivalent W sites. In the first W site, W(1) is bonded in a distorted tetrahedral geometry to one W(2) and three equivalent Sb(1) atoms. The W(1)-W(2) bond length is 1.64 Å. All W(1)-Sb(1) bond lengths are 2.54 Å. In the second W site, W(2) is bonded in a distorted trigonal pyramidal geometry to one W(1) and three equivalent Sb(2) atoms. All W(2)-Sb(2) bond lengths are 1.70 Å. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a distorted bent 150 degrees geometry to one W(1) and one Sb(2) atom. The Sb(1)-Sb(2) bond length is 0.95 Å. In the second Sb site, Sb(2) is bonded in a distorted bent 150 degrees geometry to one W(2) and one Sb(1) atom.