data_BaHgRu2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.35
_cell_length_b   3.35
_cell_length_c   8.07
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   BaHgRu2
_chemical_formula_sum   'Ba1 Hg1 Ru2'
_cell_volume   90.48
_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  0.0  0.0  0.86  1.0
  Hg  Hg1  1  0.67  0.67  0.49  1.0
  Ru  Ru2  1  0.0  0.0  0.39  1.0
  Ru  Ru3  1  0.67  0.67  0.36  1.0

data_BaHgRu2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.74
_cell_length_b   4.74
_cell_length_c   8.07
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   BaHgRu2
_chemical_formula_sum   'Ba2 Hg2 Ru4'
_cell_volume   180.96
_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  0.0  0.0  0.86  1.0
  Hg  Hg1  2  0.17  0.5  0.49  1.0
  Ru  Ru2  2  0.0  0.0  0.39  1.0
  Ru  Ru3  2  0.17  0.5  0.36  1.0

Ba Hg Ru Ru
Ba Hg Ru Ru 0 1 - - o 0 1 - o o 0 1 o - o 0 0 + o o 0 0 o + o 0 2 o o o 1 3 o o o 1 2 + + o 2 3 - - o 
BaRu2Hg crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two BaRu2Hg clusters. Ba(1) is bonded in a distorted single-bond geometry to one Hg(1) atom. The Ba(1)-Hg(1) bond length is 3.31 Å. There are two inequivalent Ru sites. In the first Ru site, Ru(1) is bonded in a 2-coordinate geometry to one Ru(2) and one Hg(1) atom. The Ru(1)-Ru(2) bond length is 1.56 Å. The Ru(1)-Hg(1) bond length is 1.77 Å. In the second Ru site, Ru(2) is bonded in a single-bond geometry to one Ru(1) and one Hg(1) atom. The Ru(2)-Hg(1) bond length is 1.09 Å. Hg(1) is bonded in a single-bond geometry to one Ba(1), one Ru(1), and one Ru(2) atom.