The crystal structure described by Mg5Sn crystallizes in the orthorhombic Amm2 space group. There are five inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), and four equivalent Mg(5) atoms to form a mixture of face and corner-sharing MgMg12 cuboctahedra. In the second Mg site, Mg(2) is bonded in a 4-coordinate geometry to two equivalent Mg(1) and four equivalent Sn(1) atoms. In the third Mg site, Mg(3) is bonded in a distorted water-like geometry to two equivalent Mg(1) and two equivalent Sn(1) atoms. In the fourth Mg site, Mg(4) is bonded in a 2-coordinate geometry to two equivalent Mg(1) and two equivalent Sn(1) atoms. In the fifth Mg site, Mg(5) is bonded in a 2-coordinate geometry to four equivalent Mg(1) and two equivalent Sn(1) atoms. Sn(1) is bonded in a 10-coordinate geometry to two equivalent Mg(3), two equivalent Mg(4), two equivalent Mg(5), and four equivalent Mg(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Mg5Sn
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.248
_cell_length_b   8.248
_cell_length_c   5.055
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   156.462
_symmetry_Int_Tables_number   1
_cell_volume   137.327
_cell_formula_units_Z   1
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  0.001  0.999  0.000  1.0
  Mg  Mg1  1  0.333  0.667  0.000  1.0
  Mg  Mg2  1  0.666  0.334  0.000  1.0
  Mg  Mg3  1  0.111  0.889  0.500  1.0
  Mg  Mg4  1  0.446  0.554  0.500  1.0
  Sn  Sn5  1  0.777  0.223  0.500  1.0
[/CIF]
.
The crystal structure described by Mg5Sn crystallizes in the orthorhombic Amm2 space group. There are five inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), and four equivalent Mg(5) atoms to form a mixture of face and corner-sharing MgMg12 cuboctahedra. In the second Mg site, Mg(2) is bonded in a 4-coordinate geometry to two equivalent Mg(1) and four equivalent Sn(1) atoms. In the third Mg site, Mg(3) is bonded in a distorted water-like geometry to two equivalent Mg(1) and two equivalent Sn(1) atoms. In the fourth Mg site, Mg(4) is bonded in a 2-coordinate geometry to two equivalent Mg(1) and two equivalent Sn(1) atoms. In the fifth Mg site, Mg(5) is bonded in a 2-coordinate geometry to four equivalent Mg(1) and two equivalent Sn(1) atoms. Sn(1) is bonded in a 10-coordinate geometry to two equivalent Mg(3), two equivalent Mg(4), two equivalent Mg(5), and four equivalent Mg(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Mg5Sn
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.248
_cell_length_b   8.248
_cell_length_c   5.055
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   156.462
_symmetry_Int_Tables_number   1
_cell_volume   137.327
_cell_formula_units_Z   1
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  0.001  0.999  0.000  1.0
  Mg  Mg1  1  0.333  0.667  0.000  1.0
  Mg  Mg2  1  0.666  0.334  0.000  1.0
  Mg  Mg3  1  0.111  0.889  0.500  1.0
  Mg  Mg4  1  0.446  0.554  0.500  1.0
  Sn  Sn5  1  0.777  0.223  0.500  1.0
[/CIF]
.