data_Mg2MnW
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.87
_cell_length_b   4.87
_cell_length_c   2.89
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Mg2MnW
_chemical_formula_sum   'Mg2 Mn1 W1'
_cell_volume   68.49
_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  Mg0  1  0.44  0.0  0.44  1.0
  Mg  Mg1  1  0.0  0.44  0.44  1.0
  Mn  Mn2  1  0.0  0.0  0.0  1.0
  W  W3  1  0.44  0.44  0.0  1.0

data_Mg2MnW
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.89
_cell_length_b   6.89
_cell_length_c   2.89
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Mg2MnW
_chemical_formula_sum   'Mg4 Mn2 W2'
_cell_volume   136.98
_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  0.22  0.22  0.44  1.0
  Mn  Mn1  2  0.0  0.0  0.0  1.0
  W  W2  2  0.44  0.0  0.0  1.0

Mg Mg Mn W
Mg Mg Mn W 0 2 o o o 0 2 o o + 0 2 + o o 0 2 + o + 0 1 o o o 0 3 o - o 0 3 o - + 0 3 o o o 0 3 o o + 0 0 o o + 1 3 - o o 1 3 - o + 1 3 o o o 1 3 o o + 1 2 o o o 1 2 o o + 1 2 o + o 1 2 o + + 1 1 o o + 2 2 o o + 2 3 o o o 3 3 o o + 
Mg2WMn crystallizes in the monoclinic Cm space group. Mg(1) is bonded in a 1-coordinate geometry to four equivalent W(1) and two equivalent Mn(1) atoms. There are a spread of Mg(1)-W(1) bond distances ranging from 2.48-3.18 Å. There is one shorter (2.48 Å) and one longer (2.66 Å) Mg(1)-Mn(1) bond length. W(1) is bonded in a 8-coordinate geometry to eight equivalent Mg(1) atoms. Mn(1) is bonded in a 4-coordinate geometry to four equivalent Mg(1) atoms.