data_Y2Sn
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.42
_cell_length_b   6.42
_cell_length_c   8.84
_cell_angle_alpha   114.22
_cell_angle_beta   114.22
_cell_angle_gamma   32.52
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Y2Sn
_chemical_formula_sum   'Y4 Sn2'
_cell_volume   177.2
_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
  Y  Y2  1  0.61  0.0  0.81  1.0
  Y  Y3  1  0.82  0.0  0.7  1.0
  Y  Y4  1  0.73  0.0  0.3  1.0
  Y  Y5  1  0.93  0.0  0.19  1.0
  Sn  Sn0  1  0.59  0.0  0.51  1.0
  Sn  Sn1  1  0.96  0.0  0.49  1.0

data_Y2Sn
_symmetry_space_group_name_H-M   P-1
_cell_length_a   3.6
_cell_length_b   6.42
_cell_length_c   8.53
_cell_angle_alpha   70.9
_cell_angle_beta   77.84
_cell_angle_gamma   73.74
_symmetry_Int_Tables_number   2
_chemical_formula_structural   Y2Sn
_chemical_formula_sum   'Y4 Sn2'
_cell_volume   177.2
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-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
  Y  Y0  2  0.0  0.15  0.8  1.0
  Y  Y1  2  0.0  0.47  0.69  1.0
  Sn  Sn2  2  0.0  0.2  0.99  1.0

Y Y Y Y Sn Sn
Y Y Y Y Sn Sn 0 1 o o o 1 4 o o o 2 3 o o o 2 5 o o o 
Y2Sn crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of two Y2Sn clusters. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 2-coordinate geometry to one Y(2) and one Sn(1) atom. The Y(1)-Y(2) bond length is 1.92 Å. The Y(1)-Sn(1) bond length is 2.57 Å. In the second Y site, Y(2) is bonded in a distorted single-bond geometry to one Y(1) and one Sn(1) atom. The Y(2)-Sn(1) bond length is 1.72 Å. Sn(1) is bonded in a distorted single-bond geometry to one Y(1) and one Y(2) atom.