data_NbW5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.09
_cell_length_b   6.91
_cell_length_c   6.91
_cell_angle_alpha   24.52
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NbW5
_chemical_formula_sum   'Nb1 W5'
_cell_volume   100.77
_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
  Nb  Nb0  1  0.0  0.0  0.01  1.0
  W  W1  1  0.54  0.0  0.54  1.0
  W  W2  1  0.0  0.0  0.94  1.0
  W  W3  1  0.54  0.0  0.06  1.0
  W  W4  1  0.0  0.0  0.5  1.0
  W  W5  1  0.54  0.0  0.45  1.0

data_NbW5
_symmetry_space_group_name_H-M   P1
_cell_length_a   2.93
_cell_length_b   5.09
_cell_length_c   6.91
_cell_angle_alpha   90.0
_cell_angle_beta   102.26
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NbW5
_chemical_formula_sum   'Nb1 W5'
_cell_volume   100.77
_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
  Nb  Nb0  1  0.99  0.0  0.99  1.0
  W  W1  1  0.06  0.0  0.06  1.0
  W  W2  1  0.46  0.54  0.46  1.0
  W  W3  1  0.5  0.0  0.5  1.0
  W  W4  1  0.55  0.54  0.55  1.0
  W  W5  1  0.94  0.54  0.94  1.0

Nb W W W W W
Nb W W W W W 0 2 o o - 0 3 o o o 0 3 - o o 1 5 o o o 1 4 + o o 1 4 o o o 2 3 o o + 2 3 - o + 3 3 o + - 3 5 o o o 4 5 - o o 4 5 o o o 4 4 o + - 
NbW5 crystallizes in the triclinic P1 space group. Nb(1) is bonded in a single-bond geometry to one W(2), one W(4), and two equivalent W(3) atoms. The Nb(1)-W(2) bond length is 0.47 Å. The Nb(1)-W(4) bond length is 3.40 Å. There is one shorter (2.34 Å) and one longer (2.80 Å) Nb(1)-W(3) bond length. There are five inequivalent W sites. In the first W site, W(1) is bonded in a single-bond geometry to one W(5) and two equivalent W(4) atoms. The W(1)-W(5) bond length is 0.60 Å. There is one shorter (2.33 Å) and one longer (2.79 Å) W(1)-W(4) bond length. In the second W site, W(2) is bonded in a single-bond geometry to one Nb(1) and one W(4) atom. The W(2)-W(4) bond length is 3.04 Å. In the third W site, W(3) is bonded in a 2-coordinate geometry to two equivalent Nb(1) atoms. In the fourth W site, W(4) is bonded in a 8-coordinate geometry to one Nb(1), one W(2), two equivalent W(1), two equivalent W(4), and two equivalent W(5) atoms. Both W(4)-W(4) bond lengths are 2.93 Å. There is one shorter (2.34 Å) and one longer (2.79 Å) W(4)-W(5) bond length. In the fifth W site, W(5) is bonded in a single-bond geometry to one W(1) and two equivalent W(4) atoms.