data_Cr2HgPd
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.65
_cell_length_b   4.65
_cell_length_c   4.65
_cell_angle_alpha   122.15
_cell_angle_beta   122.15
_cell_angle_gamma   86.32
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Cr2HgPd
_chemical_formula_sum   'Cr2 Hg1 Pd1'
_cell_volume   68.74
_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  0.25  0.0  0.7  1.0
  Cr  Cr1  1  0.0  0.25  0.7  1.0
  Hg  Hg2  1  0.0  0.0  0.39  1.0
  Pd  Pd3  1  0.0  0.0  0.0  1.0

data_Cr2HgPd
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.36
_cell_length_b   6.36
_cell_length_c   4.65
_cell_angle_alpha   90.0
_cell_angle_beta   133.16
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Cr2HgPd
_chemical_formula_sum   'Cr4 Hg2 Pd2'
_cell_volume   137.48
_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  4  0.37  0.37  0.45  1.0
  Hg  Hg1  2  0.0  0.0  0.39  1.0
  Pd  Pd2  2  0.0  0.0  0.0  1.0

Cr Cr Hg Pd
Cr Cr Hg Pd 0 2 o o o 0 3 o o + 1 2 o o o 1 3 o o + 2 3 o o o 
Cr2PdHg crystallizes in the monoclinic Cm space group. Cr(1) is bonded in a distorted single-bond geometry to two equivalent Pd(1) and one Hg(1) atom. There is one shorter (2.26 Å) and one longer (2.99 Å) Cr(1)-Pd(1) bond length. The Cr(1)-Hg(1) bond length is 1.26 Å. Pd(1) is bonded in a 5-coordinate geometry to four equivalent Cr(1) and one Hg(1) atom. The Pd(1)-Hg(1) bond length is 1.83 Å. Hg(1) is bonded in a 3-coordinate geometry to two equivalent Cr(1) and one Pd(1) atom.