The material described by Mg2Sn crystallizes in the monoclinic C2/m space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 5-coordinate geometry to three equivalent Mg(2) and five equivalent Sn(1) atoms. In the second Mg site, Mg(2) is bonded to three equivalent Mg(1), five equivalent Mg(2), and four equivalent Sn(1) atoms to form a mixture of distorted corner, edge, and face-sharing MgMg8Sn4 cuboctahedra. Sn(1) is bonded in a 9-coordinate geometry to four equivalent Mg(2) and five equivalent Mg(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Mg2Sn
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.042
_cell_length_b   6.042
_cell_length_c   7.791
_cell_angle_alpha   72.544
_cell_angle_beta   72.544
_cell_angle_gamma   31.842
_symmetry_Int_Tables_number   1
_cell_volume   142.566
_cell_formula_units_Z   2
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  0.814  0.814  0.134  1.0
  Mg  Mg1  1  0.142  0.142  0.475  1.0
  Mg  Mg2  1  0.858  0.858  0.525  1.0
  Mg  Mg3  1  0.186  0.186  0.866  1.0
  Sn  Sn4  1  0.536  0.536  0.201  1.0
  Sn  Sn5  1  0.464  0.464  0.799  1.0
[/CIF]
.
The material described by Mg2Sn crystallizes in the monoclinic C2/m space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 5-coordinate geometry to three equivalent Mg(2) and five equivalent Sn(1) atoms. In the second Mg site, Mg(2) is bonded to three equivalent Mg(1), five equivalent Mg(2), and four equivalent Sn(1) atoms to form a mixture of distorted corner, edge, and face-sharing MgMg8Sn4 cuboctahedra. Sn(1) is bonded in a 9-coordinate geometry to four equivalent Mg(2) and five equivalent Mg(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Mg2Sn
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.042
_cell_length_b   6.042
_cell_length_c   7.791
_cell_angle_alpha   72.544
_cell_angle_beta   72.544
_cell_angle_gamma   31.842
_symmetry_Int_Tables_number   1
_cell_volume   142.566
_cell_formula_units_Z   2
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  0.814  0.814  0.134  1.0
  Mg  Mg1  1  0.142  0.142  0.475  1.0
  Mg  Mg2  1  0.858  0.858  0.525  1.0
  Mg  Mg3  1  0.186  0.186  0.866  1.0
  Sn  Sn4  1  0.536  0.536  0.201  1.0
  Sn  Sn5  1  0.464  0.464  0.799  1.0
[/CIF]
.