data_CuSi2W
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.65
_cell_length_b   4.65
_cell_length_c   4.65
_cell_angle_alpha   132.38
_cell_angle_beta   132.38
_cell_angle_gamma   69.63
_symmetry_Int_Tables_number   1
_chemical_formula_structural   CuSi2W
_chemical_formula_sum   'Cu1 Si2 W1'
_cell_volume   53.69
_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
  Cu  Cu0  1  0.0  0.0  0.0  1.0
  Si  Si1  1  0.0  0.88  0.91  1.0
  Si  Si2  1  0.88  0.0  0.91  1.0
  W  W3  1  0.0  0.0  0.81  1.0

data_CuSi2W
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.31
_cell_length_b   5.31
_cell_length_c   4.65
_cell_angle_alpha   90.0
_cell_angle_beta   124.81
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   CuSi2W
_chemical_formula_sum   'Cu2 Si4 W2'
_cell_volume   107.39
_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
  Si  Si0  4  0.06  0.06  0.03  1.0
  Cu  Cu1  2  0.0  0.0  0.0  1.0
  W  W2  2  0.0  0.0  0.81  1.0

Cu Si Si W
WCuSi2 is Indium-like structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two WCuSi2 clusters. W(1) is bonded in a 3-coordinate geometry to one Cu(1) and two equivalent Si(1) atoms. The W(1)-Cu(1) bond length is 0.86 Å. Both W(1)-Si(1) bond lengths are 0.92 Å. Cu(1) is bonded in a 3-coordinate geometry to one W(1) and two equivalent Si(1) atoms. Both Cu(1)-Si(1) bond lengths are 0.43 Å. Si(1) is bonded in a 2-coordinate geometry to one W(1) and one Cu(1) atom.