data_MgCu2Ag
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.07
_cell_length_b   3.2
_cell_length_c   6.17
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   MgCu2Ag
_chemical_formula_sum   'Mg1 Cu2 Ag1'
_cell_volume   60.59
_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  Mg3  1  0.0  0.0  0.96  1.0
  Cu  Cu1  1  0.0  0.0  0.17  1.0
  Cu  Cu2  1  0.54  0.6  0.38  1.0
  Ag  Ag0  1  0.54  0.6  0.75  1.0

data_MgCu2Ag
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.07
_cell_length_b   3.2
_cell_length_c   6.17
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   MgCu2Ag
_chemical_formula_sum   'Mg1 Cu2 Ag1'
_cell_volume   60.59
_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  0.0  0.96  1.0
  Cu  Cu1  1  0.0  0.0  0.17  1.0
  Cu  Cu2  1  0.54  0.6  0.38  1.0
  Ag  Ag3  1  0.54  0.6  0.75  1.0

Mg Cu Cu Ag
MgAgCu2 crystallizes in the triclinic P1 space group. Mg(1) is bonded in a distorted single-bond geometry to four equivalent Ag(1) and one Cu(1) atom. There are a spread of Mg(1)-Ag(1) bond distances ranging from 2.30-2.82 Å. The Mg(1)-Cu(1) bond length is 1.30 Å. Ag(1) is bonded in a 5-coordinate geometry to four equivalent Mg(1) and one Cu(2) atom. The Ag(1)-Cu(2) bond length is 2.33 Å. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a single-bond geometry to one Mg(1) and four equivalent Cu(2) atoms. There are a spread of Cu(1)-Cu(2) bond distances ranging from 2.30-2.82 Å. In the second Cu site, Cu(2) is bonded in a 5-coordinate geometry to one Ag(1) and four equivalent Cu(1) atoms.