The structure described by MgSn2 crystallizes in the orthorhombic Cmcm space group. Mg(1) is bonded to four equivalent Sn(2) and six equivalent Sn(1) atoms to form distorted MgSn10 cuboctahedra that share corners with four equivalent Mg(1)Sn10 cuboctahedra, corners with six equivalent Sn(2)Mg4Sn2 cuboctahedra, corners with twelve equivalent Sn(1)Mg6Sn6 cuboctahedra,  an edgeedge with one Sn(1)Mg6Sn6 cuboctahedra, edges with three equivalent Sn(2)Mg4Sn2 cuboctahedra, edges with eight equivalent Mg(1)Sn10 cuboctahedra, faces with six equivalent Mg(1)Sn10 cuboctahedra, and faces with six equivalent Sn(1)Mg6Sn6 cuboctahedra. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to six equivalent Mg(1), two equivalent Sn(2), and four equivalent Sn(1) atoms to form distorted SnMg6Sn6 cuboctahedra that share corners with six equivalent Sn(1)Mg6Sn6 cuboctahedra, corners with twelve equivalent Mg(1)Sn10 cuboctahedra, corners with twelve equivalent Sn(2)Mg4Sn2 cuboctahedra,  an edgeedge with one Mg(1)Sn10 cuboctahedra, edges with seven equivalent Sn(2)Mg4Sn2 cuboctahedra, faces with two equivalent Sn(2)Mg4Sn2 cuboctahedra, faces with six equivalent Mg(1)Sn10 cuboctahedra, and faces with ten equivalent Sn(1)Mg6Sn6 cuboctahedra. In the second Sn site, Sn(2) is bonded to four equivalent Mg(1) and two equivalent Sn(1) atoms to form distorted SnMg4Sn2 cuboctahedra that share corners with two equivalent Sn(2)Mg4Sn2 cuboctahedra, corners with six equivalent Mg(1)Sn10 cuboctahedra, corners with twelve equivalent Sn(1)Mg6Sn6 cuboctahedra, edges with three equivalent Mg(1)Sn10 cuboctahedra, edges with six equivalent Sn(2)Mg4Sn2 cuboctahedra, edges with seven equivalent Sn(1)Mg6Sn6 cuboctahedra, and faces with two equivalent Sn(1)Mg6Sn6 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgSn2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.704
_cell_length_b   8.704
_cell_length_c   5.421
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   157.769
_symmetry_Int_Tables_number   1
_cell_volume   155.377
_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  0.111  0.889  0.250  1.0
  Mg  Mg1  1  0.889  0.111  0.750  1.0
  Sn  Sn2  1  0.443  0.557  0.250  1.0
  Sn  Sn3  1  0.776  0.224  0.250  1.0
  Sn  Sn4  1  0.224  0.776  0.750  1.0
  Sn  Sn5  1  0.557  0.443  0.750  1.0
[/CIF]
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The structure described by MgSn2 crystallizes in the orthorhombic Cmcm space group. Mg(1) is bonded to four equivalent Sn(2) and six equivalent Sn(1) atoms to form distorted MgSn10 cuboctahedra that share corners with four equivalent Mg(1)Sn10 cuboctahedra, corners with six equivalent Sn(2)Mg4Sn2 cuboctahedra, corners with twelve equivalent Sn(1)Mg6Sn6 cuboctahedra,  an edgeedge with one Sn(1)Mg6Sn6 cuboctahedra, edges with three equivalent Sn(2)Mg4Sn2 cuboctahedra, edges with eight equivalent Mg(1)Sn10 cuboctahedra, faces with six equivalent Mg(1)Sn10 cuboctahedra, and faces with six equivalent Sn(1)Mg6Sn6 cuboctahedra. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to six equivalent Mg(1), two equivalent Sn(2), and four equivalent Sn(1) atoms to form distorted SnMg6Sn6 cuboctahedra that share corners with six equivalent Sn(1)Mg6Sn6 cuboctahedra, corners with twelve equivalent Mg(1)Sn10 cuboctahedra, corners with twelve equivalent Sn(2)Mg4Sn2 cuboctahedra,  an edgeedge with one Mg(1)Sn10 cuboctahedra, edges with seven equivalent Sn(2)Mg4Sn2 cuboctahedra, faces with two equivalent Sn(2)Mg4Sn2 cuboctahedra, faces with six equivalent Mg(1)Sn10 cuboctahedra, and faces with ten equivalent Sn(1)Mg6Sn6 cuboctahedra. In the second Sn site, Sn(2) is bonded to four equivalent Mg(1) and two equivalent Sn(1) atoms to form distorted SnMg4Sn2 cuboctahedra that share corners with two equivalent Sn(2)Mg4Sn2 cuboctahedra, corners with six equivalent Mg(1)Sn10 cuboctahedra, corners with twelve equivalent Sn(1)Mg6Sn6 cuboctahedra, edges with three equivalent Mg(1)Sn10 cuboctahedra, edges with six equivalent Sn(2)Mg4Sn2 cuboctahedra, edges with seven equivalent Sn(1)Mg6Sn6 cuboctahedra, and faces with two equivalent Sn(1)Mg6Sn6 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgSn2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.704
_cell_length_b   8.704
_cell_length_c   5.421
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   157.769
_symmetry_Int_Tables_number   1
_cell_volume   155.377
_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  0.111  0.889  0.250  1.0
  Mg  Mg1  1  0.889  0.111  0.750  1.0
  Sn  Sn2  1  0.443  0.557  0.250  1.0
  Sn  Sn3  1  0.776  0.224  0.250  1.0
  Sn  Sn4  1  0.224  0.776  0.750  1.0
  Sn  Sn5  1  0.557  0.443  0.750  1.0
[/CIF]
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