data_FeSiAg2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.51
_cell_length_b   5.51
_cell_length_c   5.51
_cell_angle_alpha   149.99
_cell_angle_beta   131.51
_cell_angle_gamma   58.09
_symmetry_Int_Tables_number   1
_chemical_formula_structural   FeSiAg2
_chemical_formula_sum   'Fe1 Si1 Ag2'
_cell_volume   62.24
_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
  Fe  Fe2  1  0.0  0.0  0.82  1.0
  Si  Si3  1  0.0  0.0  0.0  1.0
  Ag  Ag0  1  0.0  0.26  0.57  1.0
  Ag  Ag1  1  0.43  0.0  0.25  1.0

data_FeSiAg2
_symmetry_space_group_name_H-M   P1
_cell_length_a   2.85
_cell_length_b   4.53
_cell_length_c   5.51
_cell_angle_alpha   114.25
_cell_angle_beta   105.01
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   FeSiAg2
_chemical_formula_sum   'Fe1 Si1 Ag2'
_cell_volume   62.24
_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
  Fe  Fe0  1  0.0  0.82  0.82  1.0
  Si  Si1  1  0.0  0.0  0.0  1.0
  Ag  Ag2  1  0.0  0.25  0.82  1.0
  Ag  Ag3  1  0.74  0.31  0.31  1.0

Fe Si Ag Ag
Fe Si Ag Ag 0 1 o o + 0 3 o o + 1 2 o - - 1 2 o o o 1 3 o o o 
FeAg2Si crystallizes in the triclinic P1 space group. Fe(1) is bonded in a single-bond geometry to one Ag(1), two equivalent Ag(2), and one Si(1) atom. The Fe(1)-Ag(1) bond length is 2.73 Å. There is one shorter (1.94 Å) and one longer (2.59 Å) Fe(1)-Ag(2) bond length. The Fe(1)-Si(1) bond length is 1.00 Å. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a 3-coordinate geometry to one Fe(1) and two equivalent Si(1) atoms. There is one shorter (2.02 Å) and one longer (2.33 Å) Ag(1)-Si(1) bond length. In the second Ag site, Ag(2) is bonded in a 3-coordinate geometry to two equivalent Fe(1) and one Si(1) atom. The Ag(2)-Si(1) bond length is 1.77 Å. Si(1) is bonded in a distorted single-bond geometry to one Fe(1), one Ag(2), and two equivalent Ag(1) atoms.