data_ReHgPt2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.82
_cell_length_b   2.82
_cell_length_c   8.36
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   ReHgPt2
_chemical_formula_sum   'Re1 Hg1 Pt2'
_cell_volume   66.7
_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
  Re  Re3  1  0.0  0.0  0.0  1.0
  Hg  Hg0  1  0.0  0.0  0.18  1.0
  Pt  Pt1  1  0.41  0.41  0.5  1.0
  Pt  Pt2  1  0.41  0.41  0.87  1.0

data_ReHgPt2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   3.99
_cell_length_b   3.99
_cell_length_c   8.36
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   ReHgPt2
_chemical_formula_sum   'Re2 Hg2 Pt4'
_cell_volume   133.41
_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
  Re  Re0  2  0.0  0.0  0.0  1.0
  Hg  Hg1  2  0.0  0.0  0.18  1.0
  Pt  Pt2  2  0.41  0.0  0.5  1.0
  Pt  Pt3  2  0.41  0.0  0.87  1.0

Re Hg Pt Pt
RePt2Hg crystallizes in the monoclinic Cm space group. Re(1) is bonded in a 5-coordinate geometry to four equivalent Pt(2) and one Hg(1) atom. There are a spread of Re(1)-Pt(2) bond distances ranging from 1.98-2.60 Å. The Re(1)-Hg(1) bond length is 1.52 Å. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 8-coordinate geometry to one Pt(2), four equivalent Pt(1), and three equivalent Hg(1) atoms. The Pt(1)-Pt(2) bond length is 3.11 Å. All Pt(1)-Pt(1) bond lengths are 2.82 Å. There is one shorter (3.10 Å) and two longer (3.32 Å) Pt(1)-Hg(1) bond lengths. In the second Pt site, Pt(2) is bonded in a 4-coordinate geometry to four equivalent Re(1) and one Pt(1) atom. Hg(1) is bonded in a single-bond geometry to one Re(1) and three equivalent Pt(1) atoms.