data_ZnHgGe2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.35
_cell_length_b   4.35
_cell_length_c   4.24
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   ZnHgGe2
_chemical_formula_sum   'Zn1 Hg1 Ge2'
_cell_volume   80.14
_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  0.0  1.0
  Hg  Hg2  1  0.17  0.17  0.0  1.0
  Ge  Ge0  1  0.0  0.17  0.12  1.0
  Ge  Ge1  1  0.17  0.0  0.12  1.0

data_ZnHgGe2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.15
_cell_length_b   6.15
_cell_length_c   4.24
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   ZnHgGe2
_chemical_formula_sum   'Zn2 Hg2 Ge4'
_cell_volume   160.28
_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  0.0  1.0
  Hg  Hg1  2  0.17  0.0  -0.0  1.0
  Ge  Ge2  4  0.09  0.09  0.12  1.0

Zn Hg Ge Ge
Zn Hg Ge Ge 0 3 o o o 0 2 o o o 0 1 o o o 1 2 o o o 1 3 o o o 2 3 o o o 
HgZnGe2 is alpha Po structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two HgZnGe2 clusters. Hg(1) is bonded in a 3-coordinate geometry to one Zn(1) and two equivalent Ge(1) atoms. The Hg(1)-Zn(1) bond length is 1.07 Å. Both Hg(1)-Ge(1) bond lengths are 0.91 Å. Zn(1) is bonded in a 3-coordinate geometry to one Hg(1) and two equivalent Ge(1) atoms. Both Zn(1)-Ge(1) bond lengths are 0.91 Å. Ge(1) is bonded in a 3-coordinate geometry to one Hg(1), one Zn(1), and one Ge(1) atom. The Ge(1)-Ge(1) bond length is 1.07 Å.