The compound 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 12-coordinate geometry to four equivalent Mg(2), five equivalent Mg(1), and three equivalent Sn(1) atoms. In the second Mg site, Mg(2) is bonded in a 5-coordinate geometry to four equivalent Mg(1) and five equivalent Sn(1) atoms. Sn(1) is bonded in a 8-coordinate geometry to three equivalent Mg(1) and five equivalent Mg(2) atoms. is represented by the CIF file [CIF]
data_Mg2Sn
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.041
_cell_length_b   6.041
_cell_length_c   7.798
_cell_angle_alpha   71.761
_cell_angle_beta   71.761
_cell_angle_gamma   31.998
_symmetry_Int_Tables_number   1
_cell_volume   142.603
_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  0.138  0.138  0.970  1.0
  Mg  Mg1  1  0.530  0.530  0.694  1.0
  Mg  Mg2  1  0.470  0.470  0.306  1.0
  Mg  Mg3  1  0.862  0.862  0.030  1.0
  Sn  Sn4  1  0.809  0.809  0.649  1.0
  Sn  Sn5  1  0.191  0.191  0.351  1.0
[/CIF]
.
The compound 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 12-coordinate geometry to four equivalent Mg(2), five equivalent Mg(1), and three equivalent Sn(1) atoms. In the second Mg site, Mg(2) is bonded in a 5-coordinate geometry to four equivalent Mg(1) and five equivalent Sn(1) atoms. Sn(1) is bonded in a 8-coordinate geometry to three equivalent Mg(1) and five equivalent Mg(2) atoms. is represented by the CIF file [CIF]
data_Mg2Sn
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.041
_cell_length_b   6.041
_cell_length_c   7.798
_cell_angle_alpha   71.761
_cell_angle_beta   71.761
_cell_angle_gamma   31.998
_symmetry_Int_Tables_number   1
_cell_volume   142.603
_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  0.138  0.138  0.970  1.0
  Mg  Mg1  1  0.530  0.530  0.694  1.0
  Mg  Mg2  1  0.470  0.470  0.306  1.0
  Mg  Mg3  1  0.862  0.862  0.030  1.0
  Sn  Sn4  1  0.809  0.809  0.649  1.0
  Sn  Sn5  1  0.191  0.191  0.351  1.0
[/CIF]
.