data_CuGe2Sb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.18
_cell_length_b   3.18
_cell_length_c   7.67
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   CuGe2Sb
_chemical_formula_sum   'Cu1 Ge2 Sb1'
_cell_volume   77.7
_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  0.0  0.0  0.99  1.0
  Ge  Ge1  1  0.59  0.59  0.46  1.0
  Ge  Ge2  1  0.0  0.0  0.64  1.0
  Sb  Sb3  1  0.59  0.59  0.1  1.0

data_CuGe2Sb
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.5
_cell_length_b   4.5
_cell_length_c   7.67
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   CuGe2Sb
_chemical_formula_sum   'Cu2 Ge4 Sb2'
_cell_volume   155.41
_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  0.99  1.0
  Ge  Ge1  2  0.0  0.0  0.64  1.0
  Ge  Ge2  2  0.09  0.5  0.46  1.0
  Sb  Sb3  2  0.09  0.5  0.1  1.0

Cu Ge Ge Sb
CuGe2Sb crystallizes in the monoclinic Cm space group. Cu(1) is bonded in a 5-coordinate geometry to one Ge(2) and four equivalent Sb(1) atoms. The Cu(1)-Ge(2) bond length is 2.66 Å. There are a spread of Cu(1)-Sb(1) bond distances ranging from 2.03-2.79 Å. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 5-coordinate geometry to four equivalent Ge(2) and one Sb(1) atom. There are a spread of Ge(1)-Ge(2) bond distances ranging from 2.32-3.01 Å. The Ge(1)-Sb(1) bond length is 2.75 Å. In the second Ge site, Ge(2) is bonded in a 5-coordinate geometry to one Cu(1) and four equivalent Ge(1) atoms. Sb(1) is bonded in a 5-coordinate geometry to four equivalent Cu(1) and one Ge(1) atom.