data_Si2W
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.95
_cell_length_b   2.95
_cell_length_c   5.86
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Si2W
_chemical_formula_sum   'Si2 W1'
_cell_volume   44.2
_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
  Si  Si0  1  0.48  0.85  0.92  1.0
  Si  Si1  1  0.0  0.7  0.94  1.0
  W  W2  1  0.0  0.0  0.0  1.0

data_Si2W
_symmetry_space_group_name_H-M   P1
_cell_length_a   2.95
_cell_length_b   2.95
_cell_length_c   5.86
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Si2W
_chemical_formula_sum   'Si2 W1'
_cell_volume   44.2
_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
  Si  Si0  1  -0.0  0.7  0.94  1.0
  Si  Si1  1  0.48  0.85  0.92  1.0
  W  W2  1  0.0  0.0  0.0  1.0

Si Si W
Si Si W 0 1 o o o 0 2 + + + 1 2 o + + 