data_CuW
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.68
_cell_length_b   2.68
_cell_length_c   7.86
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   CuW
_chemical_formula_sum   'Cu2 W2'
_cell_volume   56.28
_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
  Cu  Cu0  1  0.34  0.0  0.79  1.0
  Cu  Cu1  1  0.0  0.34  0.07  1.0
  W  W2  1  0.34  0.0  0.15  1.0
  W  W3  1  0.0  0.34  0.71  1.0

data_CuW
_symmetry_space_group_name_H-M   C2/m
_cell_length_a   3.78
_cell_length_b   3.78
_cell_length_c   7.86
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   12
_chemical_formula_structural   CuW
_chemical_formula_sum   'Cu4 W4'
_cell_volume   112.56
_cell_formula_units_Z   4
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-x, -y, -z'
  3  '-x, y, -z'
  4  'x, -y, z'
  5  'x+1/2, y+1/2, z'
  6  '-x+1/2, -y+1/2, -z'
  7  '-x+1/2, y+1/2, -z'
  8  '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
  Cu  Cu0  4  0.17  0.5  0.36  1.0
  W  W1  4  0.17  0.5  0.72  1.0

Cu Cu W W
CuW crystallizes in the monoclinic C2/m space group. The structure is zero-dimensional and consists of four CuW clusters. W(1) is bonded in a 1-coordinate geometry to one Cu(1) atom. The W(1)-Cu(1) bond length is 1.41 Å. Cu(1) is bonded in a 1-coordinate geometry to one W(1) atom.