data_Mg2SiAg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.74
_cell_length_b   4.74
_cell_length_c   3.24
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   95.2
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Mg2SiAg
_chemical_formula_sum   'Mg2 Si1 Ag1'
_cell_volume   72.65
_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  Mg1  1  0.6  0.25  0.62  1.0
  Mg  Mg2  1  0.6  0.75  0.62  1.0
  Si  Si3  1  0.0  0.0  0.0  1.0
  Ag  Ag0  1  0.2  0.0  0.0  1.0

data_Mg2SiAg
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.24
_cell_length_b   4.74
_cell_length_c   4.74
_cell_angle_alpha   95.2
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Mg2SiAg
_chemical_formula_sum   'Mg2 Si1 Ag1'
_cell_volume   72.65
_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  Mg0  1  0.62  0.6  0.25  1.0
  Mg  Mg1  1  0.62  0.6  0.75  1.0
  Si  Si2  1  0.0  0.0  0.0  1.0
  Ag  Ag3  1  0.0  0.2  0.0  1.0

Mg Mg Si Ag
Mg Mg Si Ag 0 3 o o + 0 1 o o o 0 1 o - o 0 2 + o + 1 3 o + + 1 2 + + + 2 3 o o o 
Mg2AgSi crystallizes in the triclinic P1 space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 6-coordinate geometry to two equivalent Mg(2), two equivalent Ag(1), and two equivalent Si(1) atoms. There is one shorter (2.36 Å) and one longer (2.38 Å) Mg(1)-Mg(2) bond length. There is one shorter (2.47 Å) and one longer (2.94 Å) Mg(1)-Ag(1) bond length. There is one shorter (2.63 Å) and one longer (3.08 Å) Mg(1)-Si(1) bond length. In the second Mg site, Mg(2) is bonded in a 6-coordinate geometry to two equivalent Mg(1), two equivalent Ag(1), and two equivalent Si(1) atoms. There is one shorter (2.63 Å) and one longer (3.08 Å) Mg(2)-Ag(1) bond length. There is one shorter (2.47 Å) and one longer (2.94 Å) Mg(2)-Si(1) bond length. Ag(1) is bonded in a 5-coordinate geometry to two equivalent Mg(1), two equivalent Mg(2), and one Si(1) atom. The Ag(1)-Si(1) bond length is 0.94 Å. Si(1) is bonded in a 5-coordinate geometry to two equivalent Mg(1), two equivalent Mg(2), and one Ag(1) atom.