The crystal structure described by Zr2Sn crystallizes in the monoclinic P2_1/m space group. There are eight inequivalent Zr sites. In the first Zr site, Zr(1) is bonded in a 4-coordinate geometry to one Zr(5), one Sn(2), one Sn(4), and two equivalent Sn(3) atoms. In the second Zr site, Zr(2) is bonded in a 4-coordinate geometry to one Zr(5), one Sn(1), one Sn(4), and two equivalent Sn(3) atoms. In the third Zr site, Zr(3) is bonded in a distorted bent 120 degrees geometry to three equivalent Zr(5), one Sn(2), and one Sn(3) atom. In the fourth Zr site, Zr(4) is bonded in a 3-coordinate geometry to two equivalent Zr(5), one Sn(1), one Sn(2), and one Sn(3) atom. In the fifth Zr site, Zr(5) is bonded to one Zr(1), one Zr(2), one Zr(6), one Zr(8), two equivalent Zr(4), three equivalent Zr(3), one Sn(4), and two equivalent Sn(2) atoms to form distorted ZrZr9Sn3 cuboctahedra that share  a cornercorner with one Zr(6)ZrSn4 cuboctahedra, edges with two equivalent Zr(5)Zr9Sn3 cuboctahedra, and faces with two equivalent Zr(5)Zr9Sn3 cuboctahedra. In the sixth Zr site, Zr(6) is bonded to one Zr(5), one Sn(4), and three equivalent Sn(1) atoms to form distorted ZrZrSn4 cuboctahedra that share  a cornercorner with one Zr(5)Zr9Sn3 cuboctahedra, corners with two equivalent Zr(6)ZrSn4 cuboctahedra, and edges with two equivalent Zr(6)ZrSn4 cuboctahedra. In the seventh Zr site, Zr(7) is bonded in a 5-coordinate geometry to one Sn(3), one Sn(4), and three equivalent Sn(1) atoms. In the eighth Zr site, Zr(8) is bonded in a 5-coordinate geometry to one Zr(5), one Sn(3), one Sn(4), and three equivalent Sn(2) atoms. There are four inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 8-coordinate geometry to one Zr(2), one Zr(4), three equivalent Zr(6), and three equivalent Zr(7) atoms. In the second Sn site, Sn(2) is bonded in a 8-coordinate geometry to one Zr(1), one Zr(3), one Zr(4), two equivalent Zr(5), and three equivalent Zr(8) atoms. In the third Sn site, Sn(3) is bonded in a 8-coordinate geometry to one Zr(3), one Zr(4), one Zr(7), one Zr(8), two equivalent Zr(1), and two equivalent Zr(2) atoms. In the fourth Sn site, Sn(4) is bonded in a distorted hexagonal planar geometry to one Zr(1), one Zr(2), one Zr(5), one Zr(6), one Zr(7), and one Zr(8) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Zr2Sn
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.355
_cell_length_b   8.393
_cell_length_c   12.696
_cell_angle_alpha   79.844
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   561.694
_cell_formula_units_Z   8
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
  Zr  Zr0  1  0.250  0.272  0.397  1.0
  Zr  Zr1  1  0.250  0.263  0.155  1.0
  Zr  Zr2  1  0.750  0.049  0.432  1.0
  Zr  Zr3  1  0.750  0.029  0.185  1.0
  Zr  Zr4  1  0.750  0.068  0.679  1.0
  Zr  Zr5  1  0.750  0.068  0.931  1.0
  Zr  Zr6  1  0.250  0.951  0.568  1.0
  Zr  Zr7  1  0.250  0.932  0.321  1.0
  Zr  Zr8  1  0.250  0.971  0.815  1.0
  Zr  Zr9  1  0.250  0.932  0.069  1.0
  Zr  Zr10  1  0.750  0.737  0.845  1.0
  Zr  Zr11  1  0.750  0.728  0.603  1.0
  Zr  Zr12  1  0.250  0.607  0.982  1.0
  Zr  Zr13  1  0.250  0.610  0.490  1.0
  Zr  Zr14  1  0.750  0.393  0.018  1.0
  Zr  Zr15  1  0.750  0.390  0.510  1.0
  Sn  Sn16  1  0.250  0.272  0.919  1.0
  Sn  Sn17  1  0.250  0.278  0.636  1.0
  Sn  Sn18  1  0.750  0.728  0.081  1.0
  Sn  Sn19  1  0.750  0.722  0.364  1.0
  Sn  Sn20  1  0.250  0.638  0.735  1.0
  Sn  Sn21  1  0.250  0.602  0.235  1.0
  Sn  Sn22  1  0.750  0.362  0.265  1.0
  Sn  Sn23  1  0.750  0.398  0.765  1.0
[/CIF]
.
The crystal structure described by Zr2Sn crystallizes in the monoclinic P2_1/m space group. There are eight inequivalent Zr sites. In the first Zr site, Zr(1) is bonded in a 4-coordinate geometry to one Zr(5), one Sn(2), one Sn(4), and two equivalent Sn(3) atoms. In the second Zr site, Zr(2) is bonded in a 4-coordinate geometry to one Zr(5), one Sn(1), one Sn(4), and two equivalent Sn(3) atoms. In the third Zr site, Zr(3) is bonded in a distorted bent 120 degrees geometry to three equivalent Zr(5), one Sn(2), and one Sn(3) atom. In the fourth Zr site, Zr(4) is bonded in a 3-coordinate geometry to two equivalent Zr(5), one Sn(1), one Sn(2), and one Sn(3) atom. In the fifth Zr site, Zr(5) is bonded to one Zr(1), one Zr(2), one Zr(6), one Zr(8), two equivalent Zr(4), three equivalent Zr(3), one Sn(4), and two equivalent Sn(2) atoms to form distorted ZrZr9Sn3 cuboctahedra that share  a cornercorner with one Zr(6)ZrSn4 cuboctahedra, edges with two equivalent Zr(5)Zr9Sn3 cuboctahedra, and faces with two equivalent Zr(5)Zr9Sn3 cuboctahedra. In the sixth Zr site, Zr(6) is bonded to one Zr(5), one Sn(4), and three equivalent Sn(1) atoms to form distorted ZrZrSn4 cuboctahedra that share  a cornercorner with one Zr(5)Zr9Sn3 cuboctahedra, corners with two equivalent Zr(6)ZrSn4 cuboctahedra, and edges with two equivalent Zr(6)ZrSn4 cuboctahedra. In the seventh Zr site, Zr(7) is bonded in a 5-coordinate geometry to one Sn(3), one Sn(4), and three equivalent Sn(1) atoms. In the eighth Zr site, Zr(8) is bonded in a 5-coordinate geometry to one Zr(5), one Sn(3), one Sn(4), and three equivalent Sn(2) atoms. There are four inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 8-coordinate geometry to one Zr(2), one Zr(4), three equivalent Zr(6), and three equivalent Zr(7) atoms. In the second Sn site, Sn(2) is bonded in a 8-coordinate geometry to one Zr(1), one Zr(3), one Zr(4), two equivalent Zr(5), and three equivalent Zr(8) atoms. In the third Sn site, Sn(3) is bonded in a 8-coordinate geometry to one Zr(3), one Zr(4), one Zr(7), one Zr(8), two equivalent Zr(1), and two equivalent Zr(2) atoms. In the fourth Sn site, Sn(4) is bonded in a distorted hexagonal planar geometry to one Zr(1), one Zr(2), one Zr(5), one Zr(6), one Zr(7), and one Zr(8) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Zr2Sn
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.355
_cell_length_b   8.393
_cell_length_c   12.696
_cell_angle_alpha   79.844
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   561.694
_cell_formula_units_Z   8
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
  Zr  Zr0  1  0.250  0.272  0.397  1.0
  Zr  Zr1  1  0.250  0.263  0.155  1.0
  Zr  Zr2  1  0.750  0.049  0.432  1.0
  Zr  Zr3  1  0.750  0.029  0.185  1.0
  Zr  Zr4  1  0.750  0.068  0.679  1.0
  Zr  Zr5  1  0.750  0.068  0.931  1.0
  Zr  Zr6  1  0.250  0.951  0.568  1.0
  Zr  Zr7  1  0.250  0.932  0.321  1.0
  Zr  Zr8  1  0.250  0.971  0.815  1.0
  Zr  Zr9  1  0.250  0.932  0.069  1.0
  Zr  Zr10  1  0.750  0.737  0.845  1.0
  Zr  Zr11  1  0.750  0.728  0.603  1.0
  Zr  Zr12  1  0.250  0.607  0.982  1.0
  Zr  Zr13  1  0.250  0.610  0.490  1.0
  Zr  Zr14  1  0.750  0.393  0.018  1.0
  Zr  Zr15  1  0.750  0.390  0.510  1.0
  Sn  Sn16  1  0.250  0.272  0.919  1.0
  Sn  Sn17  1  0.250  0.278  0.636  1.0
  Sn  Sn18  1  0.750  0.728  0.081  1.0
  Sn  Sn19  1  0.750  0.722  0.364  1.0
  Sn  Sn20  1  0.250  0.638  0.735  1.0
  Sn  Sn21  1  0.250  0.602  0.235  1.0
  Sn  Sn22  1  0.750  0.362  0.265  1.0
  Sn  Sn23  1  0.750  0.398  0.765  1.0
[/CIF]
.