data_K2VHg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.62
_cell_length_b   3.62
_cell_length_c   10.62
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   K2VHg
_chemical_formula_sum   'K2 V1 Hg1'
_cell_volume   139.45
_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
  K  K1  1  0.81  0.81  0.93  1.0
  K  K2  1  0.81  0.81  0.7  1.0
  V  V3  1  0.0  0.0  0.0  1.0
  Hg  Hg0  1  0.0  0.0  0.31  1.0

data_K2VHg
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.12
_cell_length_b   5.12
_cell_length_c   10.62
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   K2VHg
_chemical_formula_sum   'K4 V2 Hg2'
_cell_volume   278.89
_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
  K  K0  2  0.31  0.5  0.7  1.0
  K  K1  2  0.31  0.5  0.93  1.0
  V  V2  2  0.0  0.0  0.0  1.0
  Hg  Hg3  2  0.0  0.0  0.31  1.0

K K V Hg
K K V Hg 0 2 + + + 0 1 o o o 2 3 o o o 3 3 + o o 3 3 o + o 
K2VHg crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two K2VHg clusters. There are two inequivalent K sites. In the first K site, K(1) is bonded in a single-bond geometry to one K(2) and one V(1) atom. The K(1)-K(2) bond length is 2.41 Å. The K(1)-V(1) bond length is 1.25 Å. In the second K site, K(2) is bonded in a distorted single-bond geometry to one K(1) atom. V(1) is bonded in a single-bond geometry to one K(1) and one Hg(1) atom. The V(1)-Hg(1) bond length is 3.32 Å. Hg(1) is bonded in a single-bond geometry to one V(1) atom.