data_ZnHgP2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.16
_cell_length_b   6.16
_cell_length_c   6.16
_cell_angle_alpha   146.95
_cell_angle_beta   143.96
_cell_angle_gamma   49.69
_symmetry_Int_Tables_number   1
_chemical_formula_structural   ZnHgP2
_chemical_formula_sum   'Zn1 Hg1 P2'
_cell_volume   74.78
_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
  Zn  Zn3  1  0.0  0.0  0.0  1.0
  Hg  Hg0  1  0.0  0.0  0.59  1.0
  P  P1  1  0.75  0.0  0.53  1.0
  P  P2  1  0.0  0.91  0.07  1.0

data_ZnHgP2
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.51
_cell_length_b   3.81
_cell_length_c   6.16
_cell_angle_alpha   108.02
_cell_angle_beta   106.52
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   ZnHgP2
_chemical_formula_sum   'Zn1 Hg1 P2'
_cell_volume   74.78
_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
  Zn  Zn0  1  0.0  0.0  0.0  1.0
  Hg  Hg1  1  0.0  0.59  0.59  1.0
  P  P2  1  0.0  0.53  0.77  1.0
  P  P3  1  0.09  0.16  0.16  1.0

Zn Hg P P
Zn Hg P P 0 3 o - o 1 2 - o o 
HgZnP2 is Indium-like structured and crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one HgZnP2 cluster. Hg(1) is bonded in a single-bond geometry to one P(1) atom. The Hg(1)-P(1) bond length is 1.21 Å. Zn(1) is bonded in a 2-coordinate geometry to one P(1) and one P(2) atom. The Zn(1)-P(1) bond length is 1.91 Å. The Zn(1)-P(2) bond length is 0.95 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded in a distorted water-like geometry to one Hg(1) and one Zn(1) atom. In the second P site, P(2) is bonded in a single-bond geometry to one Zn(1) atom.