data_CrCoHg2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.19
_cell_length_b   4.19
_cell_length_c   3.89
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   CrCoHg2
_chemical_formula_sum   'Cr1 Co1 Hg2'
_cell_volume   68.21
_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  Cr1  1  0.0  0.0  0.0  1.0
  Co  Co0  1  0.09  0.09  0.0  1.0
  Hg  Hg2  1  0.0  0.09  0.95  1.0
  Hg  Hg3  1  0.09  0.0  0.95  1.0

data_CrCoHg2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.92
_cell_length_b   5.92
_cell_length_c   3.89
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   CrCoHg2
_chemical_formula_sum   'Cr2 Co2 Hg4'
_cell_volume   136.43
_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
  Co  Co1  2  0.09  0.0  0.0  1.0
  Hg  Hg2  4  0.05  0.05  0.95  1.0

Cr Co Hg Hg
Cr Co Hg Hg 0 3 o o - 0 2 o o - 1 2 o o - 1 3 o o - 
CrCoHg2 is alpha Po structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two CrCoHg2 clusters. Cr(1) is bonded in a 3-coordinate geometry to one Co(1) and two equivalent Hg(1) atoms. The Cr(1)-Co(1) bond length is 0.55 Å. Both Cr(1)-Hg(1) bond lengths are 0.44 Å. Co(1) is bonded in a 3-coordinate geometry to one Cr(1) and two equivalent Hg(1) atoms. Both Co(1)-Hg(1) bond lengths are 0.44 Å. Hg(1) is bonded in a 2-coordinate geometry to one Cr(1) and one Co(1) atom.