data_ZnGe2Sb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.63
_cell_length_b   3.63
_cell_length_c   6.51
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   ZnGe2Sb
_chemical_formula_sum   'Zn1 Ge2 Sb1'
_cell_volume   85.66
_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
  Zn  Zn3  1  0.0  0.0  0.96  1.0
  Ge  Ge0  1  0.81  0.81  0.05  1.0
  Ge  Ge1  1  0.0  0.0  0.11  1.0
  Sb  Sb2  1  0.81  0.81  0.65  1.0

data_ZnGe2Sb
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.13
_cell_length_b   5.13
_cell_length_c   6.51
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   ZnGe2Sb
_chemical_formula_sum   'Zn2 Ge4 Sb2'
_cell_volume   171.32
_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
  Zn  Zn0  2  0.0  0.0  0.96  1.0
  Ge  Ge1  2  0.0  0.0  0.11  1.0
  Ge  Ge2  2  0.31  0.5  0.05  1.0
  Sb  Sb3  2  0.31  0.5  0.65  1.0

Zn Ge Ge Sb
Zn Ge Ge Sb 0 1 - - + 0 2 o o + 0 3 - - o 1 2 + + o 1 3 o o - 
ZnGe2Sb is Indium-like structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two ZnGe2Sb clusters. Zn(1) is bonded in a 2-coordinate geometry to one Ge(1), one Ge(2), and one Sb(1) atom. The Zn(1)-Ge(1) bond length is 1.11 Å. The Zn(1)-Ge(2) bond length is 1.01 Å. The Zn(1)-Sb(1) bond length is 2.25 Å. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a distorted single-bond geometry to one Zn(1) atom. In the second Ge site, Ge(2) is bonded in a distorted single-bond geometry to one Zn(1) atom. Sb(1) is bonded in a single-bond geometry to one Zn(1) atom.