data_Y2W
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.18
_cell_length_b   7.18
_cell_length_c   7.18
_cell_angle_alpha   152.35
_cell_angle_beta   152.35
_cell_angle_gamma   39.5
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Y2W
_chemical_formula_sum   'Y2 W1'
_cell_volume   79.54
_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
  Y  Y1  1  0.0  0.0  0.97  1.0
  Y  Y2  1  0.0  0.0  0.55  1.0
  W  W0  1  0.0  0.0  0.0  1.0

data_Y2W
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.85
_cell_length_b   4.85
_cell_length_c   7.18
_cell_angle_alpha   90.0
_cell_angle_beta   109.75
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Y2W
_chemical_formula_sum   'Y4 W2'
_cell_volume   159.07
_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
  Y  Y0  2  0.05  0.5  0.55  1.0
  Y  Y1  2  0.47  0.5  0.97  1.0
  W  W2  2  0.0  0.0  0.0  1.0

Y Y W
Y2W crystallizes in the monoclinic Cm space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a single-bond geometry to one Y(2) and one W(1) atom. The Y(1)-Y(2) bond length is 3.00 Å. The Y(1)-W(1) bond length is 0.25 Å. In the second Y site, Y(2) is bonded in a 6-coordinate geometry to one Y(1), four equivalent Y(2), and one W(1) atom. All Y(2)-Y(2) bond lengths are 3.43 Å. The Y(2)-W(1) bond length is 3.94 Å. W(1) is bonded in a single-bond geometry to one Y(1) and one Y(2) atom.