The crystal structure described by Yb3Cu4Ge4 crystallizes in the orthorhombic Immm space group. There are two inequivalent Yb sites. In the first Yb site, Yb(1) is bonded to two equivalent Ge(1) and four equivalent Ge(2) atoms to form distorted edge-sharing YbGe6 octahedra. In the second Yb site, Yb(2) is bonded in a 12-coordinate geometry to six equivalent Cu(1), two equivalent Ge(1), and four equivalent Ge(2) atoms. Cu(1) is bonded in a 8-coordinate geometry to three equivalent Yb(2), one Cu(1), 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 9-coordinate geometry to one Yb(1), two equivalent Yb(2), and six equivalent Cu(1) atoms. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Yb(1), four equivalent Yb(2), two equivalent Cu(1), and one Ge(2) atom. is represented by the CIF file [CIF]
data_Yb3(CuGe)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.945
_cell_length_b   7.945
_cell_length_c   7.945
_cell_angle_alpha   149.169
_cell_angle_beta   130.392
_cell_angle_gamma   59.556
_symmetry_Int_Tables_number   1
_cell_volume   194.200
_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
  Yb  Yb0  1  0.500  0.000  0.500  1.0
  Yb  Yb1  1  0.869  0.869  0.000  1.0
  Yb  Yb2  1  0.131  0.131  0.000  1.0
  Cu  Cu3  1  0.480  0.670  0.810  1.0
  Cu  Cu4  1  0.861  0.670  0.190  1.0
  Cu  Cu5  1  0.139  0.330  0.810  1.0
  Cu  Cu6  1  0.520  0.330  0.190  1.0
  Ge  Ge7  1  0.282  0.782  0.500  1.0
  Ge  Ge8  1  0.718  0.218  0.500  1.0
  Ge  Ge9  1  0.814  0.500  0.314  1.0
  Ge  Ge10  1  0.186  0.500  0.686  1.0
[/CIF]
.
The crystal structure described by Yb3Cu4Ge4 crystallizes in the orthorhombic Immm space group. There are two inequivalent Yb sites. In the first Yb site, Yb(1) is bonded to two equivalent Ge(1) and four equivalent Ge(2) atoms to form distorted edge-sharing YbGe6 octahedra. In the second Yb site, Yb(2) is bonded in a 12-coordinate geometry to six equivalent Cu(1), two equivalent Ge(1), and four equivalent Ge(2) atoms. Cu(1) is bonded in a 8-coordinate geometry to three equivalent Yb(2), one Cu(1), 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 9-coordinate geometry to one Yb(1), two equivalent Yb(2), and six equivalent Cu(1) atoms. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Yb(1), four equivalent Yb(2), two equivalent Cu(1), and one Ge(2) atom. is represented by the CIF file [CIF]
data_Yb3(CuGe)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.945
_cell_length_b   7.945
_cell_length_c   7.945
_cell_angle_alpha   149.169
_cell_angle_beta   130.392
_cell_angle_gamma   59.556
_symmetry_Int_Tables_number   1
_cell_volume   194.200
_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
  Yb  Yb0  1  0.500  0.000  0.500  1.0
  Yb  Yb1  1  0.869  0.869  0.000  1.0
  Yb  Yb2  1  0.131  0.131  0.000  1.0
  Cu  Cu3  1  0.480  0.670  0.810  1.0
  Cu  Cu4  1  0.861  0.670  0.190  1.0
  Cu  Cu5  1  0.139  0.330  0.810  1.0
  Cu  Cu6  1  0.520  0.330  0.190  1.0
  Ge  Ge7  1  0.282  0.782  0.500  1.0
  Ge  Ge8  1  0.718  0.218  0.500  1.0
  Ge  Ge9  1  0.814  0.500  0.314  1.0
  Ge  Ge10  1  0.186  0.500  0.686  1.0
[/CIF]
.