data_MgSiAg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.93
_cell_length_b   4.93
_cell_length_c   4.93
_cell_angle_alpha   143.54
_cell_angle_beta   131.3
_cell_angle_gamma   62.34
_symmetry_Int_Tables_number   1
_chemical_formula_structural   MgSiAg
_chemical_formula_sum   'Mg1 Si1 Ag1'
_cell_volume   52.92
_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  0.0  0.0  0.8  1.0
  Si  Si2  1  0.0  0.0  0.63  1.0
  Ag  Ag0  1  0.0  0.0  0.01  1.0

data_MgSiAg
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.08
_cell_length_b   4.07
_cell_length_c   4.93
_cell_angle_alpha   114.35
_cell_angle_beta   108.23
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   MgSiAg
_chemical_formula_sum   'Mg1 Si1 Ag1'
_cell_volume   52.92
_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  0.0  0.8  0.8  1.0
  Si  Si1  1  0.0  0.63  0.63  1.0
  Ag  Ag2  1  0.0  0.01  0.01  1.0

Mg Si Ag
Mg Si Ag 0 1 o o o 0 2 o o + 