The structure described by Rb2Hg(CN)4 crystallizes in the trigonal R-3c space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded to two equivalent N(2) and four equivalent N(1) atoms to form distorted edge-sharing RbN6 octahedra. In the second Rb site, Rb(2) is bonded to six equivalent N(1) atoms to form distorted edge-sharing RbN6 octahedra. Hg(1) is bonded in a tetrahedral geometry to one C(1) and three equivalent C(2) atoms. There are two inequivalent C sites. In the first C site, C(1) is bonded in a linear geometry to one Hg(1) and one N(2) atom. In the second C site, C(2) is bonded in a distorted linear geometry to one Hg(1) and one N(1) atom. There are two inequivalent N sites. In the first N site, N(1) is bonded in a 4-coordinate geometry to one Rb(2), two equivalent Rb(1), and one C(2) atom. In the second N site, N(2) is bonded in a distorted single-bond geometry to three equivalent Rb(1) and one C(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb2Hg(CN)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   16.741
_cell_length_b   16.741
_cell_length_c   16.741
_cell_angle_alpha   31.787
_cell_angle_beta   31.787
_cell_angle_gamma   31.787
_symmetry_Int_Tables_number   1
_cell_volume   1156.318
_cell_formula_units_Z   4
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
  Rb  Rb0  1  0.686  0.814  0.250  1.0
  Rb  Rb1  1  0.750  0.314  0.186  1.0
  Rb  Rb2  1  0.186  0.750  0.314  1.0
  Rb  Rb3  1  0.500  0.500  0.500  1.0
  Rb  Rb4  1  0.814  0.250  0.686  1.0
  Rb  Rb5  1  0.314  0.186  0.750  1.0
  Rb  Rb6  1  0.000  0.000  0.000  1.0
  Rb  Rb7  1  0.250  0.686  0.814  1.0
  Hg  Hg8  1  0.812  0.812  0.812  1.0
  Hg  Hg9  1  0.312  0.312  0.312  1.0
  Hg  Hg10  1  0.688  0.688  0.688  1.0
  Hg  Hg11  1  0.188  0.188  0.188  1.0
  C  C12  1  0.858  0.858  0.858  1.0
  C  C13  1  0.142  0.142  0.142  1.0
  C  C14  1  0.712  0.053  0.626  1.0
  C  C15  1  0.374  0.288  0.947  1.0
  C  C16  1  0.447  0.788  0.874  1.0
  C  C17  1  0.642  0.642  0.642  1.0
  C  C18  1  0.212  0.126  0.553  1.0
  C  C19  1  0.126  0.553  0.212  1.0
  C  C20  1  0.553  0.212  0.126  1.0
  C  C21  1  0.626  0.712  0.053  1.0
  C  C22  1  0.874  0.447  0.788  1.0
  C  C23  1  0.788  0.874  0.447  1.0
  C  C24  1  0.358  0.358  0.358  1.0
  C  C25  1  0.947  0.374  0.288  1.0
  C  C26  1  0.288  0.947  0.374  1.0
  C  C27  1  0.053  0.626  0.712  1.0
  N  N28  1  0.650  0.182  0.533  1.0
  N  N29  1  0.182  0.533  0.650  1.0
  N  N30  1  0.033  0.682  0.150  1.0
  N  N31  1  0.850  0.967  0.318  1.0
  N  N32  1  0.117  0.117  0.117  1.0
  N  N33  1  0.617  0.617  0.617  1.0
  N  N34  1  0.967  0.318  0.850  1.0
  N  N35  1  0.533  0.650  0.182  1.0
  N  N36  1  0.467  0.350  0.818  1.0
  N  N37  1  0.383  0.383  0.383  1.0
  N  N38  1  0.150  0.033  0.682  1.0
  N  N39  1  0.318  0.850  0.967  1.0
  N  N40  1  0.682  0.150  0.033  1.0
  N  N41  1  0.350  0.818  0.467  1.0
  N  N42  1  0.818  0.467  0.350  1.0
  N  N43  1  0.883  0.883  0.883  1.0
[/CIF]
.
The structure described by Rb2Hg(CN)4 crystallizes in the trigonal R-3c space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded to two equivalent N(2) and four equivalent N(1) atoms to form distorted edge-sharing RbN6 octahedra. In the second Rb site, Rb(2) is bonded to six equivalent N(1) atoms to form distorted edge-sharing RbN6 octahedra. Hg(1) is bonded in a tetrahedral geometry to one C(1) and three equivalent C(2) atoms. There are two inequivalent C sites. In the first C site, C(1) is bonded in a linear geometry to one Hg(1) and one N(2) atom. In the second C site, C(2) is bonded in a distorted linear geometry to one Hg(1) and one N(1) atom. There are two inequivalent N sites. In the first N site, N(1) is bonded in a 4-coordinate geometry to one Rb(2), two equivalent Rb(1), and one C(2) atom. In the second N site, N(2) is bonded in a distorted single-bond geometry to three equivalent Rb(1) and one C(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb2Hg(CN)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   16.741
_cell_length_b   16.741
_cell_length_c   16.741
_cell_angle_alpha   31.787
_cell_angle_beta   31.787
_cell_angle_gamma   31.787
_symmetry_Int_Tables_number   1
_cell_volume   1156.318
_cell_formula_units_Z   4
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
  Rb  Rb0  1  0.686  0.814  0.250  1.0
  Rb  Rb1  1  0.750  0.314  0.186  1.0
  Rb  Rb2  1  0.186  0.750  0.314  1.0
  Rb  Rb3  1  0.500  0.500  0.500  1.0
  Rb  Rb4  1  0.814  0.250  0.686  1.0
  Rb  Rb5  1  0.314  0.186  0.750  1.0
  Rb  Rb6  1  0.000  0.000  0.000  1.0
  Rb  Rb7  1  0.250  0.686  0.814  1.0
  Hg  Hg8  1  0.812  0.812  0.812  1.0
  Hg  Hg9  1  0.312  0.312  0.312  1.0
  Hg  Hg10  1  0.688  0.688  0.688  1.0
  Hg  Hg11  1  0.188  0.188  0.188  1.0
  C  C12  1  0.858  0.858  0.858  1.0
  C  C13  1  0.142  0.142  0.142  1.0
  C  C14  1  0.712  0.053  0.626  1.0
  C  C15  1  0.374  0.288  0.947  1.0
  C  C16  1  0.447  0.788  0.874  1.0
  C  C17  1  0.642  0.642  0.642  1.0
  C  C18  1  0.212  0.126  0.553  1.0
  C  C19  1  0.126  0.553  0.212  1.0
  C  C20  1  0.553  0.212  0.126  1.0
  C  C21  1  0.626  0.712  0.053  1.0
  C  C22  1  0.874  0.447  0.788  1.0
  C  C23  1  0.788  0.874  0.447  1.0
  C  C24  1  0.358  0.358  0.358  1.0
  C  C25  1  0.947  0.374  0.288  1.0
  C  C26  1  0.288  0.947  0.374  1.0
  C  C27  1  0.053  0.626  0.712  1.0
  N  N28  1  0.650  0.182  0.533  1.0
  N  N29  1  0.182  0.533  0.650  1.0
  N  N30  1  0.033  0.682  0.150  1.0
  N  N31  1  0.850  0.967  0.318  1.0
  N  N32  1  0.117  0.117  0.117  1.0
  N  N33  1  0.617  0.617  0.617  1.0
  N  N34  1  0.967  0.318  0.850  1.0
  N  N35  1  0.533  0.650  0.182  1.0
  N  N36  1  0.467  0.350  0.818  1.0
  N  N37  1  0.383  0.383  0.383  1.0
  N  N38  1  0.150  0.033  0.682  1.0
  N  N39  1  0.318  0.850  0.967  1.0
  N  N40  1  0.682  0.150  0.033  1.0
  N  N41  1  0.350  0.818  0.467  1.0
  N  N42  1  0.818  0.467  0.350  1.0
  N  N43  1  0.883  0.883  0.883  1.0
[/CIF]
.