data_Mg2BiW
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.42
_cell_length_b   4.42
_cell_length_c   4.16
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Mg2BiW
_chemical_formula_sum   'Mg2 Bi1 W1'
_cell_volume   81.37
_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
  Mg  Mg1  1  0.21  0.0  0.08  1.0
  Mg  Mg2  1  0.0  0.21  0.08  1.0
  Bi  Bi0  1  0.21  0.21  0.0  1.0
  W  W3  1  0.0  0.0  0.0  1.0

data_Mg2BiW
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.25
_cell_length_b   6.25
_cell_length_c   4.16
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Mg2BiW
_chemical_formula_sum   'Mg4 Bi2 W2'
_cell_volume   162.74
_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
  Mg  Mg0  4  0.11  0.11  0.08  1.0
  Bi  Bi1  2  0.21  0.0  0.0  1.0
  W  W2  2  0.0  0.0  0.0  1.0

Mg Mg Bi W
Mg2WBi is alpha Po structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two Mg2WBi clusters. Mg(1) is bonded in an L-shaped geometry to one W(1) and one Bi(1) atom. The Mg(1)-W(1) bond length is 0.99 Å. The Mg(1)-Bi(1) bond length is 0.99 Å. W(1) is bonded in an L-shaped geometry to two equivalent Mg(1) atoms. Bi(1) is bonded in an L-shaped geometry to two equivalent Mg(1) atoms.