data_Si2NiAg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.3
_cell_length_b   4.3
_cell_length_c   4.8
_cell_angle_alpha   99.64
_cell_angle_beta   99.64
_cell_angle_gamma   42.89
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Si2NiAg
_chemical_formula_sum   'Si2 Ni1 Ag1'
_cell_volume   59.51
_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  0.03  0.0  0.29  1.0
  Si  Si3  1  0.36  0.0  0.69  1.0
  Ni  Ni1  1  0.75  0.0  0.67  1.0
  Ag  Ag0  1  0.58  0.0  0.42  1.0

data_Si2NiAg
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.15
_cell_length_b   4.3
_cell_length_c   4.8
_cell_angle_alpha   99.64
_cell_angle_beta   90.0
_cell_angle_gamma   111.44
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Si2NiAg
_chemical_formula_sum   'Si2 Ni1 Ag1'
_cell_volume   59.51
_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  0.64  0.31  1.0
  Si  Si1  1  0.0  0.97  0.71  1.0
  Ni  Ni2  1  0.0  0.25  0.33  1.0
  Ag  Ag3  1  0.0  0.42  0.58  1.0

Si Si Ni Ag
NiAgSi2 crystallizes in the triclinic P1 space group. Ni(1) is bonded in a distorted single-bond geometry to one Ag(1), two equivalent Si(1), and two equivalent Si(2) atoms. The Ni(1)-Ag(1) bond length is 1.31 Å. There is one shorter (2.36 Å) and one longer (3.02 Å) Ni(1)-Si(1) bond length. There is one shorter (1.70 Å) and one longer (2.61 Å) Ni(1)-Si(2) bond length. Ag(1) is bonded in a 1-coordinate geometry to one Ni(1), one Si(2), and four equivalent Si(1) atoms. The Ag(1)-Si(2) bond length is 1.73 Å. There are a spread of Ag(1)-Si(1) bond distances ranging from 2.16-3.17 Å. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 7-coordinate geometry to two equivalent Ni(1), four equivalent Ag(1), and one Si(2) atom. The Si(1)-Si(2) bond length is 2.19 Å. In the second Si site, Si(2) is bonded in a 4-coordinate geometry to two equivalent Ni(1), one Ag(1), and one Si(1) atom.