The structure described by Ag3Mg is Uranium Silicide-like structured and crystallizes in the tetragonal I4/mmm space group. Mg(1) is bonded to four equivalent Ag(1) and eight equivalent Ag(2) atoms to form MgAg12 cuboctahedra that share corners with four equivalent Mg(1)Ag12 cuboctahedra, corners with eight equivalent Ag(1)Mg4Ag8 cuboctahedra, edges with eight equivalent Mg(1)Ag12 cuboctahedra, edges with sixteen equivalent Ag(2)Mg4Ag8 cuboctahedra, faces with four equivalent Mg(1)Ag12 cuboctahedra, faces with six equivalent Ag(1)Mg4Ag8 cuboctahedra, and faces with eight equivalent Ag(2)Mg4Ag8 cuboctahedra. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded to four equivalent Mg(1) and eight equivalent Ag(2) atoms to form distorted AgMg4Ag8 cuboctahedra that share corners with four equivalent Ag(1)Mg4Ag8 cuboctahedra, corners with eight equivalent Mg(1)Ag12 cuboctahedra, edges with eight equivalent Ag(1)Mg4Ag8 cuboctahedra, edges with sixteen equivalent Ag(2)Mg4Ag8 cuboctahedra, faces with four equivalent Ag(1)Mg4Ag8 cuboctahedra, faces with six equivalent Mg(1)Ag12 cuboctahedra, and faces with eight equivalent Ag(2)Mg4Ag8 cuboctahedra. In the second Ag site, Ag(2) is bonded to four equivalent Mg(1), four equivalent Ag(1), and four equivalent Ag(2) atoms to form distorted AgMg4Ag8 cuboctahedra that share corners with twelve equivalent Ag(2)Mg4Ag8 cuboctahedra, edges with eight equivalent Mg(1)Ag12 cuboctahedra, edges with eight equivalent Ag(1)Mg4Ag8 cuboctahedra, edges with eight equivalent Ag(2)Mg4Ag8 cuboctahedra, faces with four equivalent Mg(1)Ag12 cuboctahedra, faces with four equivalent Ag(1)Mg4Ag8 cuboctahedra, and faces with ten equivalent Ag(2)Mg4Ag8 cuboctahedra. is represented by the CIF card [CIF]
data_MgAg3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.066
_cell_length_b   5.066
_cell_length_c   5.066
_cell_angle_alpha   132.262
_cell_angle_beta   132.262
_cell_angle_gamma   69.815
_symmetry_Int_Tables_number   1
_cell_volume   69.826
_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  0.000  0.000  0.000  1.0
  Ag  Ag1  1  0.500  0.500  0.000  1.0
  Ag  Ag2  1  0.750  0.250  0.500  1.0
  Ag  Ag3  1  0.250  0.750  0.500  1.0
[/CIF]
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The structure described by Ag3Mg is Uranium Silicide-like structured and crystallizes in the tetragonal I4/mmm space group. Mg(1) is bonded to four equivalent Ag(1) and eight equivalent Ag(2) atoms to form MgAg12 cuboctahedra that share corners with four equivalent Mg(1)Ag12 cuboctahedra, corners with eight equivalent Ag(1)Mg4Ag8 cuboctahedra, edges with eight equivalent Mg(1)Ag12 cuboctahedra, edges with sixteen equivalent Ag(2)Mg4Ag8 cuboctahedra, faces with four equivalent Mg(1)Ag12 cuboctahedra, faces with six equivalent Ag(1)Mg4Ag8 cuboctahedra, and faces with eight equivalent Ag(2)Mg4Ag8 cuboctahedra. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded to four equivalent Mg(1) and eight equivalent Ag(2) atoms to form distorted AgMg4Ag8 cuboctahedra that share corners with four equivalent Ag(1)Mg4Ag8 cuboctahedra, corners with eight equivalent Mg(1)Ag12 cuboctahedra, edges with eight equivalent Ag(1)Mg4Ag8 cuboctahedra, edges with sixteen equivalent Ag(2)Mg4Ag8 cuboctahedra, faces with four equivalent Ag(1)Mg4Ag8 cuboctahedra, faces with six equivalent Mg(1)Ag12 cuboctahedra, and faces with eight equivalent Ag(2)Mg4Ag8 cuboctahedra. In the second Ag site, Ag(2) is bonded to four equivalent Mg(1), four equivalent Ag(1), and four equivalent Ag(2) atoms to form distorted AgMg4Ag8 cuboctahedra that share corners with twelve equivalent Ag(2)Mg4Ag8 cuboctahedra, edges with eight equivalent Mg(1)Ag12 cuboctahedra, edges with eight equivalent Ag(1)Mg4Ag8 cuboctahedra, edges with eight equivalent Ag(2)Mg4Ag8 cuboctahedra, faces with four equivalent Mg(1)Ag12 cuboctahedra, faces with four equivalent Ag(1)Mg4Ag8 cuboctahedra, and faces with ten equivalent Ag(2)Mg4Ag8 cuboctahedra. is represented by the CIF card [CIF]
data_MgAg3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.066
_cell_length_b   5.066
_cell_length_c   5.066
_cell_angle_alpha   132.262
_cell_angle_beta   132.262
_cell_angle_gamma   69.815
_symmetry_Int_Tables_number   1
_cell_volume   69.826
_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  0.000  0.000  0.000  1.0
  Ag  Ag1  1  0.500  0.500  0.000  1.0
  Ag  Ag2  1  0.750  0.250  0.500  1.0
  Ag  Ag3  1  0.250  0.750  0.500  1.0
[/CIF]
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