data_Mg2AsW
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.13
_cell_length_b   4.13
_cell_length_c   4.01
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Mg2AsW
_chemical_formula_sum   'Mg2 As1 W1'
_cell_volume   68.41
_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  0.0  0.07  0.01  1.0
  Mg  Mg2  1  0.07  0.0  0.01  1.0
  As  As0  1  0.0  0.0  0.0  1.0
  W  W3  1  0.07  0.07  0.0  1.0

data_Mg2AsW
_symmetry_space_group_name_H-M   Amm2
_cell_length_a   4.01
_cell_length_b   5.84
_cell_length_c   5.84
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   38
_chemical_formula_structural   Mg2AsW
_chemical_formula_sum   'Mg4 As2 W2'
_cell_volume   136.83
_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, y, z'
  4  'x, -y, z'
  5  'x, y+1/2, z+1/2'
  6  '-x, -y+1/2, z+1/2'
  7  '-x, y+1/2, z+1/2'
  8  'x, -y+1/2, z+1/2'
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  0.0  0.03  0.03  1.0
  As  As1  2  0.0  0.0  0.0  1.0
  W  W2  2  0.0  0.0  0.07  1.0

Mg Mg As W
Mg2WAs is alpha Po structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two Mg2WAs clusters. Mg(1) is bonded in an L-shaped geometry to one W(1) and one As(1) atom. The Mg(1)-W(1) bond length is 0.27 Å. The Mg(1)-As(1) bond length is 0.27 Å. W(1) is bonded in an L-shaped geometry to two equivalent Mg(1) atoms. As(1) is bonded in an L-shaped geometry to two equivalent Mg(1) atoms.