data_YHgP2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.51
_cell_length_b   6.51
_cell_length_c   6.51
_cell_angle_alpha   36.99
_cell_angle_beta   36.99
_cell_angle_gamma   36.99
_symmetry_Int_Tables_number   1
_chemical_formula_structural   YHgP2
_chemical_formula_sum   'Y1 Hg1 P2'
_cell_volume   89.44
_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
  Y  Y3  1  0.0  0.0  0.0  1.0
  Hg  Hg0  1  0.0  0.0  0.09  1.0
  P  P1  1  0.0  0.0  0.63  1.0
  P  P2  1  0.0  0.0  0.54  1.0

data_YHgP2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   7.15
_cell_length_b   4.13
_cell_length_c   6.51
_cell_angle_alpha   90.0
_cell_angle_beta   111.48
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   YHgP2
_chemical_formula_sum   'Y2 Hg2 P4'
_cell_volume   178.88
_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
  Y  Y0  2  0.0  0.0  0.0  1.0
  Hg  Hg1  2  0.0  0.0  0.91  1.0
  P  P2  2  0.0  0.0  0.37  1.0
  P  P3  2  0.0  0.0  0.46  1.0

Y Hg P P
Y Hg P P 0 1 o o o 2 3 o o o 
YHgP2 crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two YHgP2 clusters. Y(1) is bonded in a distorted single-bond geometry to one Hg(1) and one P(1) atom. The Y(1)-Hg(1) bond length is 0.56 Å. The Y(1)-P(1) bond length is 2.42 Å. Hg(1) is bonded in a single-bond geometry to one Y(1) atom. There are two inequivalent P sites. In the first P site, P(1) is bonded in a linear geometry to one Y(1) and one P(2) atom. The P(1)-P(2) bond length is 0.55 Å. In the second P site, P(2) is bonded in a distorted single-bond geometry to one P(1) atom.