The structure described by Mg2Sn crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 14-coordinate geometry to two equivalent Mg(1), six equivalent Mg(2), and six equivalent Sn(1) atoms. In the second Mg site, Mg(2) is bonded to six equivalent Mg(1) and five equivalent Sn(1) atoms to form a mixture of face and corner-sharing MgMg6Sn5 trigonal bipyramids. Sn(1) is bonded in a 11-coordinate geometry to five equivalent Mg(2) and six equivalent Mg(1) atoms. is represented by the CIF card [CIF]
data_Mg2Sn
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.058
_cell_length_b   5.058
_cell_length_c   6.274
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   139.027
_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  0.000  0.000  0.500  1.0
  Mg  Mg1  1  0.000  0.000  0.000  1.0
  Mg  Mg2  1  0.333  0.667  0.750  1.0
  Mg  Mg3  1  0.667  0.333  0.250  1.0
  Sn  Sn4  1  0.333  0.667  0.250  1.0
  Sn  Sn5  1  0.667  0.333  0.750  1.0
[/CIF]
.
The structure described by Mg2Sn crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 14-coordinate geometry to two equivalent Mg(1), six equivalent Mg(2), and six equivalent Sn(1) atoms. In the second Mg site, Mg(2) is bonded to six equivalent Mg(1) and five equivalent Sn(1) atoms to form a mixture of face and corner-sharing MgMg6Sn5 trigonal bipyramids. Sn(1) is bonded in a 11-coordinate geometry to five equivalent Mg(2) and six equivalent Mg(1) atoms. is represented by the CIF card [CIF]
data_Mg2Sn
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.058
_cell_length_b   5.058
_cell_length_c   6.274
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   139.027
_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  0.000  0.000  0.500  1.0
  Mg  Mg1  1  0.000  0.000  0.000  1.0
  Mg  Mg2  1  0.333  0.667  0.750  1.0
  Mg  Mg3  1  0.667  0.333  0.250  1.0
  Sn  Sn4  1  0.333  0.667  0.250  1.0
  Sn  Sn5  1  0.667  0.333  0.750  1.0
[/CIF]
.