data_Cu2ReAg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.68
_cell_length_b   2.68
_cell_length_c   7.82
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Cu2ReAg
_chemical_formula_sum   'Cu2 Re1 Ag1'
_cell_volume   56.36
_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
  Cu  Cu1  1  0.34  0.34  0.17  1.0
  Cu  Cu2  1  0.0  0.0  0.85  1.0
  Re  Re3  1  0.34  0.34  0.73  1.0
  Ag  Ag0  1  0.0  0.0  0.98  1.0

data_Cu2ReAg
_symmetry_space_group_name_H-M   Cm
_cell_length_a   3.8
_cell_length_b   3.8
_cell_length_c   7.82
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Cu2ReAg
_chemical_formula_sum   'Cu4 Re2 Ag2'
_cell_volume   112.73
_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
  Cu  Cu0  2  0.0  0.0  0.85  1.0
  Cu  Cu1  2  0.34  0.0  0.17  1.0
  Re  Re2  2  0.34  0.0  0.73  1.0
  Ag  Ag3  2  0.0  0.0  0.98  1.0

Cu Cu Re Ag
Cu Cu Re Ag 0 3 o o - 0 3 o + - 0 3 + o - 1 3 o o o 1 2 o o o 
ReAgCu2 crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two ReAgCu2 clusters. Re(1) is bonded in a distorted single-bond geometry to one Cu(2) atom. The Re(1)-Cu(2) bond length is 1.63 Å. Ag(1) is bonded in a distorted single-bond geometry to one Cu(1) and one Cu(2) atom. The Ag(1)-Cu(1) bond length is 1.95 Å. The Ag(1)-Cu(2) bond length is 1.01 Å. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a distorted single-bond geometry to one Ag(1) atom. In the second Cu site, Cu(2) is bonded in a distorted single-bond geometry to one Re(1) and one Ag(1) atom.