data_K2HgMo
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.72
_cell_length_b   4.72
_cell_length_c   6.55
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   K2HgMo
_chemical_formula_sum   'K2 Hg1 Mo1'
_cell_volume   146.27
_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  0.36  0.36  0.89  1.0
  K  K2  1  0.36  0.36  0.67  1.0
  Hg  Hg0  1  0.0  0.0  0.28  1.0
  Mo  Mo3  1  0.0  0.0  0.0  1.0

data_K2HgMo
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.68
_cell_length_b   6.68
_cell_length_c   6.55
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   K2HgMo
_chemical_formula_sum   'K4 Hg2 Mo2'
_cell_volume   292.53
_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  0.36  0.0  0.67  1.0
  K  K1  2  0.36  0.0  0.89  1.0
  Hg  Hg2  2  0.0  0.0  0.28  1.0
  Mo  Mo3  2  0.0  0.0  0.0  1.0

K K Hg Mo
K K Hg Mo 0 1 o o o 2 3 o o o 
K2MoHg crystallizes in the monoclinic Cm space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 4-coordinate geometry to one K(2) and three equivalent Mo(1) atoms. The K(1)-K(2) bond length is 1.45 Å. There is one shorter (2.53 Å) and two longer (3.54 Å) K(1)-Mo(1) bond lengths. In the second K site, K(2) is bonded in a 2-coordinate geometry to one K(1) and one Hg(1) atom. The K(2)-Hg(1) bond length is 3.52 Å. Mo(1) is bonded in a 4-coordinate geometry to three equivalent K(1) and one Hg(1) atom. The Mo(1)-Hg(1) bond length is 1.82 Å. Hg(1) is bonded in a 2-coordinate geometry to one K(2) and one Mo(1) atom.