data_SiAgAu2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.95
_cell_length_b   8.95
_cell_length_c   8.95
_cell_angle_alpha   19.51
_cell_angle_beta   19.51
_cell_angle_gamma   19.51
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SiAgAu2
_chemical_formula_sum   'Si1 Ag1 Au2'
_cell_volume   69.85
_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
  Si  Si3  1  0.0  0.0  0.0  1.0
  Ag  Ag0  1  0.0  0.0  0.16  1.0
  Au  Au1  1  0.0  0.0  0.77  1.0
  Au  Au2  1  0.0  0.0  0.54  1.0

data_SiAgAu2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.25
_cell_length_b   3.03
_cell_length_c   8.95
_cell_angle_alpha   90.0
_cell_angle_beta   101.28
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   SiAgAu2
_chemical_formula_sum   'Si2 Ag2 Au4'
_cell_volume   139.69
_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
  Si  Si0  2  0.0  0.0  0.0  1.0
  Ag  Ag1  2  0.0  0.0  0.84  1.0
  Au  Au2  2  0.0  0.0  0.23  1.0
  Au  Au3  2  0.0  0.0  0.46  1.0

Si Ag Au Au
Si Ag Au Au 0 1 o o o 0 2 o o - 2 3 o o o 
Au2AgSi crystallizes in the monoclinic Cm space group. There are two inequivalent Au sites. In the first Au site, Au(1) is bonded in a distorted single-bond geometry to one Au(2) and one Si(1) atom. The Au(1)-Au(2) bond length is 2.06 Å. The Au(1)-Si(1) bond length is 2.02 Å. In the second Au site, Au(2) is bonded in a 8-coordinate geometry to one Au(1), six equivalent Au(2), and one Ag(1) atom. All Au(2)-Au(2) bond lengths are 3.03 Å. The Au(2)-Ag(1) bond length is 3.44 Å. Ag(1) is bonded in a single-bond geometry to one Au(2) and one Si(1) atom. The Ag(1)-Si(1) bond length is 1.43 Å. Si(1) is bonded in a linear geometry to one Au(1) and one Ag(1) atom.