data_HgPd2Pt
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.24
_cell_length_b   3.24
_cell_length_c   6.44
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   HgPd2Pt
_chemical_formula_sum   'Hg1 Pd2 Pt1'
_cell_volume   67.63
_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
  Hg  Hg0  1  0.0  0.0  0.22  1.0
  Pd  Pd1  1  0.62  0.62  0.93  1.0
  Pd  Pd2  1  0.62  0.62  0.51  1.0
  Pt  Pt3  1  0.0  0.0  0.0  1.0

data_HgPd2Pt
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.58
_cell_length_b   4.58
_cell_length_c   6.44
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   HgPd2Pt
_chemical_formula_sum   'Hg2 Pd4 Pt2'
_cell_volume   135.26
_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
  Hg  Hg0  2  0.0  0.0  0.22  1.0
  Pd  Pd1  2  0.12  0.5  0.51  1.0
  Pd  Pd2  2  0.12  0.5  0.93  1.0
  Pt  Pt3  2  0.0  0.0  0.0  1.0

Hg Pd Pd Pt
PtPd2Hg crystallizes in the monoclinic Cm space group. Pt(1) is bonded in a 1-coordinate geometry to one Pd(1) and one Hg(1) atom. The Pt(1)-Pd(1) bond length is 1.80 Å. The Pt(1)-Hg(1) bond length is 1.42 Å. There are two inequivalent Pd sites. In the first Pd site, Pd(1) is bonded in a 1-coordinate geometry to one Pt(1) and one Pd(2) atom. The Pd(1)-Pd(2) bond length is 2.67 Å. In the second Pd site, Pd(2) is bonded in a 4-coordinate geometry to one Pd(1) and three equivalent Hg(1) atoms. There is one shorter (2.57 Å) and two longer (3.02 Å) Pd(2)-Hg(1) bond lengths. Hg(1) is bonded in a distorted single-bond geometry to one Pt(1) and three equivalent Pd(2) atoms.