data_SiAg2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.27
_cell_length_b   4.27
_cell_length_c   4.27
_cell_angle_alpha   119.03
_cell_angle_beta   119.03
_cell_angle_gamma   91.69
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SiAg2
_chemical_formula_sum   'Si1 Ag2'
_cell_volume   55.9
_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  Si2  1  0.0  0.0  0.0  1.0
  Ag  Ag0  1  0.0  0.17  0.49  1.0
  Ag  Ag1  1  0.17  0.0  0.49  1.0

data_SiAg2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.95
_cell_length_b   6.13
_cell_length_c   4.27
_cell_angle_alpha   90.0
_cell_angle_beta   134.15
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   SiAg2
_chemical_formula_sum   'Si2 Ag4'
_cell_volume   111.79
_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  4  0.1  0.42  0.51  1.0

Si Ag Ag
Si Ag Ag 0 1 o o o 0 2 o o o 1 2 o o o 
Ag2Si crystallizes in the monoclinic Cm space group. Ag(1) is bonded in a 1-coordinate geometry to one Ag(1) and three equivalent Si(1) atoms. The Ag(1)-Ag(1) bond length is 1.02 Å. There are a spread of Ag(1)-Si(1) bond distances ranging from 1.85-3.14 Å. Si(1) is bonded in a 6-coordinate geometry to six equivalent Ag(1) atoms.