data_SiAs2Au
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.17
_cell_length_b   5.17
_cell_length_c   5.17
_cell_angle_alpha   131.97
_cell_angle_beta   131.97
_cell_angle_gamma   70.28
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SiAs2Au
_chemical_formula_sum   'Si1 As2 Au1'
_cell_volume   74.66
_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
  As  As0  1  0.1  0.0  0.11  1.0
  As  As1  1  0.0  0.1  0.11  1.0
  Au  Au2  1  0.0  0.0  0.22  1.0

data_SiAs2Au
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.95
_cell_length_b   5.95
_cell_length_c   5.17
_cell_angle_alpha   90.0
_cell_angle_beta   125.14
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   SiAs2Au
_chemical_formula_sum   'Si2 As4 Au2'
_cell_volume   149.33
_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
  As  As1  4  0.44  0.45  0.99  1.0
  Au  Au2  2  0.28  0.5  0.78  1.0

Si As As Au
AuSiAs2 is Indium-like structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two AuSiAs2 clusters. Au(1) is bonded in a 2-coordinate geometry to two equivalent As(1) atoms. Both Au(1)-As(1) bond lengths are 1.01 Å. Si(1) is bonded in an L-shaped geometry to two equivalent As(1) atoms. Both Si(1)-As(1) bond lengths are 0.45 Å. As(1) is bonded in a distorted single-bond geometry to one Au(1) and one Si(1) atom.