data_Y2SiAu
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.54
_cell_length_b   3.54
_cell_length_c   7.23
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Y2SiAu
_chemical_formula_sum   'Y2 Si1 Au1'
_cell_volume   90.74
_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  Y2  1  0.77  0.77  0.75  1.0
  Y  Y3  1  0.77  0.77  0.48  1.0
  Si  Si1  1  0.0  0.0  0.0  1.0
  Au  Au0  1  0.0  0.0  0.62  1.0

data_Y2SiAu
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.01
_cell_length_b   5.01
_cell_length_c   7.23
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Y2SiAu
_chemical_formula_sum   'Y4 Si2 Au2'
_cell_volume   181.47
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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  0.27  0.5  0.48  1.0
  Y  Y1  2  0.27  0.5  0.75  1.0
  Si  Si2  2  0.0  0.0  0.0  1.0
  Au  Au3  2  0.0  0.0  0.62  1.0

Y Y Si Au
Y Y Si Au 0 3 + + o 0 2 + + + 1 3 + + o 
Y2AuSi crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two Y2AuSi clusters. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a distorted single-bond geometry to one Au(1) and one Si(1) atom. The Y(1)-Au(1) bond length is 1.49 Å. The Y(1)-Si(1) bond length is 2.16 Å. In the second Y site, Y(2) is bonded in a single-bond geometry to one Au(1) atom. The Y(2)-Au(1) bond length is 1.49 Å. Au(1) is bonded in a distorted L-shaped geometry to one Y(1) and one Y(2) atom. Si(1) is bonded in a single-bond geometry to one Y(1) atom.