The material described by MgSn2 crystallizes in the trigonal R32 space group. Mg(1) is bonded in a 9-coordinate geometry to three equivalent Sn(2) and six equivalent Sn(1) atoms. There are two inequivalent Sn sites. In the first Sn site, Sn(2) is bonded to six equivalent Mg(1) and six equivalent Sn(1) atoms to form a mixture of edge and corner-sharing SnMg6Sn6 cuboctahedra. In the second Sn site, Sn(1) is bonded in a 4-coordinate geometry to four equivalent Mg(1) and two equivalent Sn(2) atoms. is represented by the CIF file [CIF]
data_MgSn2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.146
_cell_length_b   6.146
_cell_length_c   6.146
_cell_angle_alpha   57.393
_cell_angle_beta   57.393
_cell_angle_gamma   57.393
_symmetry_Int_Tables_number   1
_cell_volume   154.325
_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  0.168  0.168  0.168  1.0
  Mg  Mg1  1  0.832  0.832  0.832  1.0
  Sn  Sn2  1  0.000  0.670  0.330  1.0
  Sn  Sn3  1  0.330  0.000  0.670  1.0
  Sn  Sn4  1  0.500  0.500  0.500  1.0
  Sn  Sn5  1  0.670  0.330  0.000  1.0
[/CIF]
.
The material described by MgSn2 crystallizes in the trigonal R32 space group. Mg(1) is bonded in a 9-coordinate geometry to three equivalent Sn(2) and six equivalent Sn(1) atoms. There are two inequivalent Sn sites. In the first Sn site, Sn(2) is bonded to six equivalent Mg(1) and six equivalent Sn(1) atoms to form a mixture of edge and corner-sharing SnMg6Sn6 cuboctahedra. In the second Sn site, Sn(1) is bonded in a 4-coordinate geometry to four equivalent Mg(1) and two equivalent Sn(2) atoms. is represented by the CIF file [CIF]
data_MgSn2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.146
_cell_length_b   6.146
_cell_length_c   6.146
_cell_angle_alpha   57.393
_cell_angle_beta   57.393
_cell_angle_gamma   57.393
_symmetry_Int_Tables_number   1
_cell_volume   154.325
_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  0.168  0.168  0.168  1.0
  Mg  Mg1  1  0.832  0.832  0.832  1.0
  Sn  Sn2  1  0.000  0.670  0.330  1.0
  Sn  Sn3  1  0.330  0.000  0.670  1.0
  Sn  Sn4  1  0.500  0.500  0.500  1.0
  Sn  Sn5  1  0.670  0.330  0.000  1.0
[/CIF]
.