data_ZnSiAg2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.09
_cell_length_b   9.09
_cell_length_c   9.09
_cell_angle_alpha   18.48
_cell_angle_beta   18.48
_cell_angle_gamma   18.48
_symmetry_Int_Tables_number   1
_chemical_formula_structural   ZnSiAg2
_chemical_formula_sum   'Zn1 Si1 Ag2'
_cell_volume   65.86
_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
  Zn  Zn3  1  0.0  0.0  0.4  1.0
  Si  Si2  1  0.0  0.0  0.0  1.0
  Ag  Ag0  1  0.0  0.0  0.09  1.0
  Ag  Ag1  1  0.0  0.0  0.7  1.0

data_ZnSiAg2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.05
_cell_length_b   2.92
_cell_length_c   9.09
_cell_angle_alpha   90.0
_cell_angle_beta   100.68
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   ZnSiAg2
_chemical_formula_sum   'Zn2 Si2 Ag4'
_cell_volume   131.73
_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
  Zn  Zn0  2  0.0  0.0  0.6  1.0
  Si  Si1  2  0.0  0.0  0.0  1.0
  Ag  Ag2  2  0.0  0.0  0.3  1.0
  Ag  Ag3  2  0.0  0.0  0.91  1.0

Zn Si Ag Ag
Ag2ZnSi crystallizes in the monoclinic Cm space group. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a single-bond geometry to one Zn(1) and one Si(1) atom. The Ag(1)-Zn(1) bond length is 2.74 Å. The Ag(1)-Si(1) bond length is 0.86 Å. In the second Ag site, Ag(2) is bonded to six equivalent Ag(2), one Zn(1), and one Si(1) atom to form a mixture of distorted corner and edge-sharing AgZnSiAg6 hexagonal bipyramids. All Ag(2)-Ag(2) bond lengths are 2.92 Å. The Ag(2)-Zn(1) bond length is 2.74 Å. The Ag(2)-Si(1) bond length is 2.75 Å. Zn(1) is bonded in a distorted linear geometry to one Ag(1) and one Ag(2) atom. Si(1) is bonded in a single-bond geometry to one Ag(1) and one Ag(2) atom.