data_CrHgPt2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.8
_cell_length_b   2.8
_cell_length_c   8.16
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   CrHgPt2
_chemical_formula_sum   'Cr1 Hg1 Pt2'
_cell_volume   64.13
_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
  Cr  Cr0  1  0.0  0.0  0.0  1.0
  Hg  Hg1  1  0.0  0.0  0.08  1.0
  Pt  Pt2  1  0.4  0.4  0.43  1.0
  Pt  Pt3  1  0.4  0.4  0.73  1.0

data_CrHgPt2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   3.96
_cell_length_b   3.96
_cell_length_c   8.16
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   CrHgPt2
_chemical_formula_sum   'Cr2 Hg2 Pt4'
_cell_volume   128.26
_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
  Cr  Cr0  2  0.0  0.0  0.0  1.0
  Hg  Hg1  2  0.0  0.0  0.08  1.0
  Pt  Pt2  2  0.4  0.0  0.43  1.0
  Pt  Pt3  2  0.4  0.0  0.73  1.0

Cr Hg Pt Pt
CrPt2Hg crystallizes in the monoclinic Cm space group. Cr(1) is bonded in a single-bond geometry to four equivalent Pt(2) and one Hg(1) atom. There are a spread of Cr(1)-Pt(2) bond distances ranging from 2.71-3.23 Å. The Cr(1)-Hg(1) bond length is 0.66 Å. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded to one Pt(2), four equivalent Pt(1), and one Hg(1) atom to form a mixture of distorted corner and edge-sharing PtHgPt5 octahedra. The corner-sharing octahedra are not tilted. The Pt(1)-Pt(2) bond length is 2.45 Å. All Pt(1)-Pt(1) bond lengths are 2.80 Å. The Pt(1)-Hg(1) bond length is 3.27 Å. In the second Pt site, Pt(2) is bonded in a 9-coordinate geometry to four equivalent Cr(1), one Pt(1), and four equivalent Pt(2) atoms. All Pt(2)-Pt(2) bond lengths are 2.80 Å. Hg(1) is bonded in a single-bond geometry to one Cr(1) and one Pt(1) atom.