data_MgSiAg2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.18
_cell_length_b   9.18
_cell_length_c   9.18
_cell_angle_alpha   18.88
_cell_angle_beta   18.88
_cell_angle_gamma   18.88
_symmetry_Int_Tables_number   1
_chemical_formula_structural   MgSiAg2
_chemical_formula_sum   'Mg1 Si1 Ag2'
_cell_volume   70.7
_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
  Mg  Mg2  1  0.0  0.0  0.0  1.0
  Si  Si3  1  0.0  0.0  0.52  1.0
  Ag  Ag0  1  0.0  0.0  0.67  1.0
  Ag  Ag1  1  0.0  0.0  0.36  1.0

data_MgSiAg2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.21
_cell_length_b   3.01
_cell_length_c   9.18
_cell_angle_alpha   90.0
_cell_angle_beta   100.91
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   MgSiAg2
_chemical_formula_sum   'Mg2 Si2 Ag4'
_cell_volume   141.39
_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
  Mg  Mg0  2  0.0  0.0  0.0  1.0
  Si  Si1  2  0.0  0.0  0.48  1.0
  Ag  Ag2  2  0.0  0.0  0.33  1.0
  Ag  Ag3  2  0.0  0.0  0.64  1.0

Mg Si Ag Ag
MgAg2Si crystallizes in the monoclinic Cm space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a distorted linear geometry to six Mg(1,1); one Ag(1); and one Ag(2) atom. All Mg(1)-Mg(1,1) bond lengths are 3.01 Å. The Mg(1)-Ag(1) bond length is 2.98 Å. The Mg(1)-Ag(2) bond length is 3.29 Å. In the second Mg site, Mg(1) is bonded in a distorted linear geometry to six Mg(1,1); one Ag(1); and one Ag(2) atom. Both Mg(1)-Mg(1) bond lengths are 3.01 Å. The Mg(1)-Ag(1) bond length is 2.98 Å. The Mg(1)-Ag(2) bond length is 3.29 Å. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a distorted single-bond geometry to one Mg(1) and one Si(1) atom. The Ag(1)-Si(1) bond length is 1.45 Å. In the second Ag site, Ag(2) is bonded in a distorted single-bond geometry to one Mg(1) and one Si(1) atom. The Ag(2)-Si(1) bond length is 1.45 Å. Si(1) is bonded in a linear geometry to one Ag(1) and one Ag(2) atom.