data_Mg2FeAg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.41
_cell_length_b   4.41
_cell_length_c   3.48
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Mg2FeAg
_chemical_formula_sum   'Mg2 Fe1 Ag1'
_cell_volume   67.68
_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  0.21  0.74  1.0
  Mg  Mg3  1  0.21  0.0  0.74  1.0
  Fe  Fe1  1  0.0  0.0  0.0  1.0
  Ag  Ag0  1  0.21  0.21  0.0  1.0

data_Mg2FeAg
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.24
_cell_length_b   6.24
_cell_length_c   3.48
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Mg2FeAg
_chemical_formula_sum   'Mg4 Fe2 Ag2'
_cell_volume   135.36
_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  4  0.1  0.1  0.74  1.0
  Fe  Fe1  2  0.0  0.0  0.0  1.0
  Ag  Ag2  2  0.21  0.0  0.0  1.0

Mg Mg Fe Ag
Mg2FeAg is alpha Po structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two Mg2FeAg clusters. Mg(1) is bonded in a 3-coordinate geometry to one Mg(1), one Fe(1), and one Ag(1) atom. The Mg(1)-Mg(1) bond length is 1.28 Å. The Mg(1)-Fe(1) bond length is 1.28 Å. The Mg(1)-Ag(1) bond length is 1.28 Å. Fe(1) is bonded in a 3-coordinate geometry to two equivalent Mg(1) and one Ag(1) atom. The Fe(1)-Ag(1) bond length is 1.28 Å. Ag(1) is bonded in a 3-coordinate geometry to two equivalent Mg(1) and one Fe(1) atom.