The material described by Cu5Ge2 crystallizes in the trigonal R3m space group. There are five inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 11-coordinate geometry to one Cu(3), one Cu(5), three equivalent Cu(4), three equivalent Ge(1), and three equivalent Ge(2) atoms. In the second Cu site, Cu(2) is bonded in a 10-coordinate geometry to one Cu(4), three equivalent Cu(3), three equivalent Cu(5), and three equivalent Ge(1) atoms. In the third Cu site, Cu(3) is bonded in a 8-coordinate geometry to one Cu(1), three equivalent Cu(2), one Ge(1), and three equivalent Ge(2) atoms. In the fourth Cu site, Cu(4) is bonded in a 4-coordinate geometry to one Cu(2), three equivalent Cu(1), one Ge(1), and three equivalent Ge(2) atoms. In the fifth Cu site, Cu(5) is bonded in a distorted body-centered cubic geometry to one Cu(1), three equivalent Cu(2), one Ge(2), and three equivalent Ge(1) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 11-coordinate geometry to one Cu(3), one Cu(4), three equivalent Cu(1), three equivalent Cu(2), and three equivalent Cu(5) atoms. In the second Ge site, Ge(2) is bonded in a 7-coordinate geometry to one Cu(5), three equivalent Cu(1), three equivalent Cu(3), and three equivalent Cu(4) atoms. is represented by the CIF file [CIF]
data_Cu5Ge2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.000
_cell_length_b   7.000
_cell_length_c   7.000
_cell_angle_alpha   34.176
_cell_angle_beta   34.176
_cell_angle_gamma   34.176
_symmetry_Int_Tables_number   1
_cell_volume   96.495
_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  Cu0  1  0.745  0.745  0.745  1.0
  Cu  Cu1  1  0.259  0.259  0.259  1.0
  Cu  Cu2  1  0.875  0.875  0.875  1.0
  Cu  Cu3  1  0.129  0.129  0.129  1.0
  Cu  Cu4  1  0.621  0.621  0.621  1.0
  Ge  Ge5  1  0.005  0.005  0.005  1.0
  Ge  Ge6  1  0.492  0.492  0.492  1.0
[/CIF]
.
The material described by Cu5Ge2 crystallizes in the trigonal R3m space group. There are five inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 11-coordinate geometry to one Cu(3), one Cu(5), three equivalent Cu(4), three equivalent Ge(1), and three equivalent Ge(2) atoms. In the second Cu site, Cu(2) is bonded in a 10-coordinate geometry to one Cu(4), three equivalent Cu(3), three equivalent Cu(5), and three equivalent Ge(1) atoms. In the third Cu site, Cu(3) is bonded in a 8-coordinate geometry to one Cu(1), three equivalent Cu(2), one Ge(1), and three equivalent Ge(2) atoms. In the fourth Cu site, Cu(4) is bonded in a 4-coordinate geometry to one Cu(2), three equivalent Cu(1), one Ge(1), and three equivalent Ge(2) atoms. In the fifth Cu site, Cu(5) is bonded in a distorted body-centered cubic geometry to one Cu(1), three equivalent Cu(2), one Ge(2), and three equivalent Ge(1) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 11-coordinate geometry to one Cu(3), one Cu(4), three equivalent Cu(1), three equivalent Cu(2), and three equivalent Cu(5) atoms. In the second Ge site, Ge(2) is bonded in a 7-coordinate geometry to one Cu(5), three equivalent Cu(1), three equivalent Cu(3), and three equivalent Cu(4) atoms. is represented by the CIF file [CIF]
data_Cu5Ge2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.000
_cell_length_b   7.000
_cell_length_c   7.000
_cell_angle_alpha   34.176
_cell_angle_beta   34.176
_cell_angle_gamma   34.176
_symmetry_Int_Tables_number   1
_cell_volume   96.495
_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  Cu0  1  0.745  0.745  0.745  1.0
  Cu  Cu1  1  0.259  0.259  0.259  1.0
  Cu  Cu2  1  0.875  0.875  0.875  1.0
  Cu  Cu3  1  0.129  0.129  0.129  1.0
  Cu  Cu4  1  0.621  0.621  0.621  1.0
  Ge  Ge5  1  0.005  0.005  0.005  1.0
  Ge  Ge6  1  0.492  0.492  0.492  1.0
[/CIF]
.