data_YSi2Pb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.44
_cell_length_b   5.44
_cell_length_c   5.44
_cell_angle_alpha   133.05
_cell_angle_beta   129.67
_cell_angle_gamma   71.28
_symmetry_Int_Tables_number   1
_chemical_formula_structural   YSi2Pb
_chemical_formula_sum   'Y1 Si2 Pb1'
_cell_volume   88.74
_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
  Y  Y3  1  0.0  0.0  0.0  1.0
  Si  Si1  1  0.0  0.31  0.23  1.0
  Si  Si2  1  0.17  0.0  0.19  1.0
  Pb  Pb0  1  0.0  0.0  0.42  1.0

data_YSi2Pb
_symmetry_space_group_name_H-M   P1
_cell_length_a   4.34
_cell_length_b   4.63
_cell_length_c   5.44
_cell_angle_alpha   115.16
_cell_angle_beta   113.48
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   YSi2Pb
_chemical_formula_sum   'Y1 Si2 Pb1'
_cell_volume   88.74
_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
  Y  Y0  1  0.0  0.0  0.0  1.0
  Si  Si1  1  0.0  0.19  0.02  1.0
  Si  Si2  1  0.69  0.92  0.92  1.0
  Pb  Pb3  1  0.0  0.42  0.42  1.0

Y Si Si Pb
Y Si Si Pb 0 2 o o o 0 1 o o o 0 3 o o o 2 3 o o o 
YPbSi2 crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one YPbSi2 cluster. Y(1) is bonded in a distorted water-like geometry to one Si(1) and one Si(2) atom. The Y(1)-Si(1) bond length is 1.25 Å. The Y(1)-Si(2) bond length is 0.84 Å. Pb(1) is bonded in a 1-coordinate geometry to one Si(2) atom. The Pb(1)-Si(2) bond length is 1.97 Å. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a single-bond geometry to one Y(1) atom. In the second Si site, Si(2) is bonded in a single-bond geometry to one Y(1) and one Pb(1) atom.