data_NaW2Br
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.94
_cell_length_b   4.94
_cell_length_c   2.9
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaW2Br
_chemical_formula_sum   'Na1 W2 Br1'
_cell_volume   70.65
_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  Na1  1  0.0  0.0  0.0  1.0
  W  W2  1  0.0  0.47  0.45  1.0
  W  W3  1  0.47  0.0  0.45  1.0
  Br  Br0  1  0.47  0.47  0.0  1.0

data_NaW2Br
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.99
_cell_length_b   6.99
_cell_length_c   2.9
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   NaW2Br
_chemical_formula_sum   'Na2 W4 Br2'
_cell_volume   141.31
_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  0.0  1.0
  W  W1  4  0.23  0.23  0.45  1.0
  Br  Br2  2  0.47  0.0  -0.0  1.0

Na W W Br
NaW2Br is alpha iridium vanadium-derived structured and crystallizes in the monoclinic Cm space group. Na(1) is bonded in a 8-coordinate geometry to eight equivalent W(1) atoms. There are a spread of Na(1)-W(1) bond distances ranging from 2.66-3.07 Å. W(1) is bonded in a 8-coordinate geometry to four equivalent Na(1) and four equivalent Br(1) atoms. There are a spread of W(1)-Br(1) bond distances ranging from 2.66-3.07 Å. Br(1) is bonded in a 8-coordinate geometry to eight equivalent W(1) atoms.