The material described by Ge3Cu is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. Cu(1) is bonded to twelve equivalent Ge(1) atoms to form CuGe12 cuboctahedra that share corners with six equivalent Cu(1)Ge12 cuboctahedra, corners with twelve equivalent Ge(1)Cu4Ge8 cuboctahedra, edges with eighteen equivalent Ge(1)Cu4Ge8 cuboctahedra, faces with eight equivalent Cu(1)Ge12 cuboctahedra, and faces with twelve equivalent Ge(1)Cu4Ge8 cuboctahedra. Ge(1) is bonded to four equivalent Cu(1) and eight equivalent Ge(1) atoms to form distorted GeCu4Ge8 cuboctahedra that share corners with four equivalent Cu(1)Ge12 cuboctahedra, corners with fourteen equivalent Ge(1)Cu4Ge8 cuboctahedra, edges with six equivalent Cu(1)Ge12 cuboctahedra, edges with twelve equivalent Ge(1)Cu4Ge8 cuboctahedra, faces with four equivalent Cu(1)Ge12 cuboctahedra, and faces with sixteen equivalent Ge(1)Cu4Ge8 cuboctahedra. is represented by the CIF card [CIF]
data_CuGe3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.832
_cell_length_b   5.832
_cell_length_c   4.699
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   138.386
_cell_formula_units_Z   2
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  0.667  0.333  0.250  1.0
  Cu  Cu1  1  0.333  0.667  0.750  1.0
  Ge  Ge2  1  0.347  0.173  0.750  1.0
  Ge  Ge3  1  0.827  0.173  0.750  1.0
  Ge  Ge4  1  0.827  0.653  0.750  1.0
  Ge  Ge5  1  0.173  0.827  0.250  1.0
  Ge  Ge6  1  0.173  0.347  0.250  1.0
  Ge  Ge7  1  0.653  0.827  0.250  1.0
[/CIF]
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The material described by Ge3Cu is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. Cu(1) is bonded to twelve equivalent Ge(1) atoms to form CuGe12 cuboctahedra that share corners with six equivalent Cu(1)Ge12 cuboctahedra, corners with twelve equivalent Ge(1)Cu4Ge8 cuboctahedra, edges with eighteen equivalent Ge(1)Cu4Ge8 cuboctahedra, faces with eight equivalent Cu(1)Ge12 cuboctahedra, and faces with twelve equivalent Ge(1)Cu4Ge8 cuboctahedra. Ge(1) is bonded to four equivalent Cu(1) and eight equivalent Ge(1) atoms to form distorted GeCu4Ge8 cuboctahedra that share corners with four equivalent Cu(1)Ge12 cuboctahedra, corners with fourteen equivalent Ge(1)Cu4Ge8 cuboctahedra, edges with six equivalent Cu(1)Ge12 cuboctahedra, edges with twelve equivalent Ge(1)Cu4Ge8 cuboctahedra, faces with four equivalent Cu(1)Ge12 cuboctahedra, and faces with sixteen equivalent Ge(1)Cu4Ge8 cuboctahedra. is represented by the CIF card [CIF]
data_CuGe3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.832
_cell_length_b   5.832
_cell_length_c   4.699
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   138.386
_cell_formula_units_Z   2
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  0.667  0.333  0.250  1.0
  Cu  Cu1  1  0.333  0.667  0.750  1.0
  Ge  Ge2  1  0.347  0.173  0.750  1.0
  Ge  Ge3  1  0.827  0.173  0.750  1.0
  Ge  Ge4  1  0.827  0.653  0.750  1.0
  Ge  Ge5  1  0.173  0.827  0.250  1.0
  Ge  Ge6  1  0.173  0.347  0.250  1.0
  Ge  Ge7  1  0.653  0.827  0.250  1.0
[/CIF]
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