data_SrHgRh2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.85
_cell_length_b   4.85
_cell_length_c   4.85
_cell_angle_alpha   120.85
_cell_angle_beta   120.85
_cell_angle_gamma   88.53
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SrHgRh2
_chemical_formula_sum   'Sr1 Hg1 Rh2'
_cell_volume   79.7
_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
  Sr  Sr3  1  0.0  0.0  0.0  1.0
  Hg  Hg0  1  0.0  0.0  0.47  1.0
  Rh  Rh1  1  0.39  0.0  0.74  1.0
  Rh  Rh2  1  0.0  0.39  0.74  1.0

data_SrHgRh2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.77
_cell_length_b   6.77
_cell_length_c   4.85
_cell_angle_alpha   90.0
_cell_angle_beta   134.27
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   SrHgRh2
_chemical_formula_sum   'Sr2 Hg2 Rh4'
_cell_volume   159.41
_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
  Sr  Sr0  2  0.0  0.0  0.0  1.0
  Hg  Hg1  2  0.03  0.5  0.53  1.0
  Rh  Rh2  4  0.46  0.2  0.66  1.0

Sr Hg Rh Rh
Sr Hg Rh Rh 0 3 o o - 0 3 o - - 0 2 - o - 0 2 o o - 0 1 o o - 0 1 o o o 1 3 o o o 1 2 o o o 
SrRh2Hg crystallizes in the monoclinic Cm space group. Sr(1) is bonded in a 6-coordinate geometry to four equivalent Rh(1) and two equivalent Hg(1) atoms. There are two shorter (2.53 Å) and two longer (2.79 Å) Sr(1)-Rh(1) bond lengths. There is one shorter (2.30 Å) and one longer (2.55 Å) Sr(1)-Hg(1) bond length. Rh(1) is bonded in a 2-coordinate geometry to two equivalent Sr(1) and one Hg(1) atom. The Rh(1)-Hg(1) bond length is 1.67 Å. Hg(1) is bonded in a 4-coordinate geometry to two equivalent Sr(1) and two equivalent Rh(1) atoms.