data_MgReAg2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.85
_cell_length_b   4.85
_cell_length_c   2.88
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   MgReAg2
_chemical_formula_sum   'Mg1 Re1 Ag2'
_cell_volume   67.82
_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  0.0  0.0  1.0
  Re  Re3  1  0.43  0.43  0.0  1.0
  Ag  Ag0  1  0.43  0.0  0.44  1.0
  Ag  Ag1  1  0.0  0.43  0.44  1.0

data_MgReAg2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.86
_cell_length_b   6.86
_cell_length_c   2.88
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   MgReAg2
_chemical_formula_sum   'Mg2 Re2 Ag4'
_cell_volume   135.64
_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  2  0.0  0.0  0.0  1.0
  Re  Re1  2  0.43  0.0  0.0  1.0
  Ag  Ag2  4  0.21  0.21  0.44  1.0

Mg Re Ag Ag
MgReAg2 crystallizes in the monoclinic Cm space group. Mg(1) is bonded in a 4-coordinate geometry to three equivalent Re(1) and four equivalent Ag(1) atoms. There is one shorter (2.92 Å) and two longer (3.47 Å) Mg(1)-Re(1) bond lengths. There are two shorter (2.43 Å) and two longer (2.62 Å) Mg(1)-Ag(1) bond lengths. Re(1) is bonded in a 13-coordinate geometry to three equivalent Mg(1), two equivalent Re(1), and eight equivalent Ag(1) atoms. Both Re(1)-Re(1) bond lengths are 2.88 Å. There are a spread of Re(1)-Ag(1) bond distances ranging from 2.43-3.22 Å. Ag(1) is bonded in a 2-coordinate geometry to two equivalent Mg(1) and four equivalent Re(1) atoms.