data_SiAg2As
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.86
_cell_length_b   2.86
_cell_length_c   8.9
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   102.76
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SiAg2As
_chemical_formula_sum   'Si1 Ag2 As1'
_cell_volume   71.03
_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  0.17  1.0
  Ag  Ag0  1  0.79  0.0  0.06  1.0
  Ag  Ag1  1  0.0  0.0  0.73  1.0
  As  As2  1  0.79  0.0  0.4  1.0

data_SiAg2As
_symmetry_space_group_name_H-M   P1
_cell_length_a   2.86
_cell_length_b   2.86
_cell_length_c   8.9
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   102.76
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SiAg2As
_chemical_formula_sum   'Si1 Ag2 As1'
_cell_volume   71.03
_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  Si0  1  0.0  0.0  0.17  1.0
  Ag  Ag1  1  0.0  0.0  0.73  1.0
  Ag  Ag2  1  0.79  0.0  0.06  1.0
  As  As3  1  0.79  0.0  0.4  1.0

Si Ag Ag As
Si Ag Ag As 0 1 - o o 0 3 - o o 1 2 + o - 2 3 - o o 2 2 o + o 2 2 + o o 
Ag2SiAs crystallizes in the triclinic P1 space group. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a single-bond geometry to one Ag(2) and one Si(1) atom. The Ag(1)-Ag(2) bond length is 3.08 Å. The Ag(1)-Si(1) bond length is 1.11 Å. In the second Ag site, Ag(2) is bonded in a 6-coordinate geometry to one Ag(1), four equivalent Ag(2), and one As(1) atom. All Ag(2)-Ag(2) bond lengths are 2.86 Å. The Ag(2)-As(1) bond length is 3.00 Å. Si(1) is bonded in a 2-coordinate geometry to one Ag(1) and one As(1) atom. The Si(1)-As(1) bond length is 2.12 Å. As(1) is bonded in a distorted single-bond geometry to one Ag(2) and one Si(1) atom.