The structure described by K2Hg(CN)4 crystallizes in the cubic Fd-3m space group. K(1) is bonded to six equivalent N(1) atoms to form distorted edge-sharing KN6 octahedra. Hg(1) is bonded to four equivalent C(1) atoms to form HgC4 tetrahedra that share corners with four equivalent N(1)K3C tetrahedra. C(1) is bonded in a linear geometry to one Hg(1) and one N(1) atom. N(1) is bonded to three equivalent K(1) and one C(1) atom to form distorted NK3C tetrahedra that share  a cornercorner with one Hg(1)C4 tetrahedra, corners with nine equivalent N(1)K3C tetrahedra, and edges with three equivalent N(1)K3C tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_K2Hg(CN)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.211
_cell_length_b   9.211
_cell_length_c   9.211
_cell_angle_alpha   60.000
_cell_angle_beta   60.000
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   552.602
_cell_formula_units_Z   2
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  K0  1  0.125  0.125  0.125  1.0
  K  K1  1  0.625  0.125  0.125  1.0
  K  K2  1  0.125  0.125  0.625  1.0
  K  K3  1  0.125  0.625  0.125  1.0
  Hg  Hg4  1  0.500  0.500  0.500  1.0
  Hg  Hg5  1  0.750  0.750  0.750  1.0
  C  C6  1  0.848  0.848  0.456  1.0
  C  C7  1  0.402  0.402  0.402  1.0
  C  C8  1  0.456  0.848  0.848  1.0
  C  C9  1  0.848  0.456  0.848  1.0
  C  C10  1  0.402  0.402  0.794  1.0
  C  C11  1  0.402  0.794  0.402  1.0
  C  C12  1  0.848  0.848  0.848  1.0
  C  C13  1  0.794  0.402  0.402  1.0
  N  N14  1  0.350  0.950  0.350  1.0
  N  N15  1  0.350  0.350  0.950  1.0
  N  N16  1  0.900  0.300  0.900  1.0
  N  N17  1  0.350  0.350  0.350  1.0
  N  N18  1  0.900  0.900  0.300  1.0
  N  N19  1  0.300  0.900  0.900  1.0
  N  N20  1  0.900  0.900  0.900  1.0
  N  N21  1  0.950  0.350  0.350  1.0
[/CIF]
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The structure described by K2Hg(CN)4 crystallizes in the cubic Fd-3m space group. K(1) is bonded to six equivalent N(1) atoms to form distorted edge-sharing KN6 octahedra. Hg(1) is bonded to four equivalent C(1) atoms to form HgC4 tetrahedra that share corners with four equivalent N(1)K3C tetrahedra. C(1) is bonded in a linear geometry to one Hg(1) and one N(1) atom. N(1) is bonded to three equivalent K(1) and one C(1) atom to form distorted NK3C tetrahedra that share  a cornercorner with one Hg(1)C4 tetrahedra, corners with nine equivalent N(1)K3C tetrahedra, and edges with three equivalent N(1)K3C tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_K2Hg(CN)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.211
_cell_length_b   9.211
_cell_length_c   9.211
_cell_angle_alpha   60.000
_cell_angle_beta   60.000
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   552.602
_cell_formula_units_Z   2
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  K0  1  0.125  0.125  0.125  1.0
  K  K1  1  0.625  0.125  0.125  1.0
  K  K2  1  0.125  0.125  0.625  1.0
  K  K3  1  0.125  0.625  0.125  1.0
  Hg  Hg4  1  0.500  0.500  0.500  1.0
  Hg  Hg5  1  0.750  0.750  0.750  1.0
  C  C6  1  0.848  0.848  0.456  1.0
  C  C7  1  0.402  0.402  0.402  1.0
  C  C8  1  0.456  0.848  0.848  1.0
  C  C9  1  0.848  0.456  0.848  1.0
  C  C10  1  0.402  0.402  0.794  1.0
  C  C11  1  0.402  0.794  0.402  1.0
  C  C12  1  0.848  0.848  0.848  1.0
  C  C13  1  0.794  0.402  0.402  1.0
  N  N14  1  0.350  0.950  0.350  1.0
  N  N15  1  0.350  0.350  0.950  1.0
  N  N16  1  0.900  0.300  0.900  1.0
  N  N17  1  0.350  0.350  0.350  1.0
  N  N18  1  0.900  0.900  0.300  1.0
  N  N19  1  0.300  0.900  0.900  1.0
  N  N20  1  0.900  0.900  0.900  1.0
  N  N21  1  0.950  0.350  0.350  1.0
[/CIF]
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