data_BaHg2Ge
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.81
_cell_length_b   4.81
_cell_length_c   5.14
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   BaHg2Ge
_chemical_formula_sum   'Ba1 Hg2 Ge1'
_cell_volume   118.83
_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
  Ba  Ba0  1  0.41  0.41  0.0  1.0
  Hg  Hg2  1  0.0  0.41  0.57  1.0
  Hg  Hg3  1  0.41  0.0  0.57  1.0
  Ge  Ge1  1  0.0  0.0  0.0  1.0

data_BaHg2Ge
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.8
_cell_length_b   6.8
_cell_length_c   5.14
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   BaHg2Ge
_chemical_formula_sum   'Ba2 Hg4 Ge2'
_cell_volume   237.65
_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
  Ba  Ba0  2  0.41  0.0  -0.0  1.0
  Hg  Hg1  4  0.2  0.2  0.57  1.0
  Ge  Ge2  2  0.0  0.0  0.0  1.0

Ba Hg Hg Ge
BaHg2Ge crystallizes in the monoclinic Cm space group. Ba(1) is bonded in a 12-coordinate geometry to eight equivalent Hg(1) and four equivalent Ge(1) atoms. There are a spread of Ba(1)-Hg(1) bond distances ranging from 2.95-4.09 Å. There are a spread of Ba(1)-Ge(1) bond distances ranging from 2.76-4.05 Å. Hg(1) is bonded in a 1-coordinate geometry to four equivalent Ba(1) atoms. Ge(1) is bonded in a 1-coordinate geometry to four equivalent Ba(1) atoms.